./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/in-de62.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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 23:20:04,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 23:20:04,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 23:20:04,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 23:20:04,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 23:20:04,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 23:20:04,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 23:20:04,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 23:20:04,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 23:20:04,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 23:20:04,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 23:20:04,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 23:20:04,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 23:20:04,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 23:20:04,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 23:20:04,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 23:20:04,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 23:20:04,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 23:20:04,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 23:20:04,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 23:20:04,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 23:20:04,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 23:20:04,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 23:20:04,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 23:20:04,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 23:20:04,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 23:20:04,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 23:20:04,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 23:20:04,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 23:20:04,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 23:20:04,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 23:20:04,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 23:20:04,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 23:20:04,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 23:20:04,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 23:20:04,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 23:20:04,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 23:20:04,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 23:20:04,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 23:20:04,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 23:20:04,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 23:20:04,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 23:20:04,535 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 23:20:04,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 23:20:04,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 23:20:04,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 23:20:04,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 23:20:04,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 23:20:04,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 23:20:04,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 23:20:04,540 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 23:20:04,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 23:20:04,541 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 23:20:04,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 23:20:04,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 23:20:04,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 23:20:04,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 23:20:04,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 23:20:04,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 23:20:04,542 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 23:20:04,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 23:20:04,542 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 23:20:04,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 23:20:04,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 23:20:04,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 23:20:04,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 23:20:04,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:20:04,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 23:20:04,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 23:20:04,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 23:20:04,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 23:20:04,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 23:20:04,545 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 23:20:04,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 23:20:04,545 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 23:20:04,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 23:20:04,546 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 23:20:04,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2023-02-14 23:20:04,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 23:20:04,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 23:20:04,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 23:20:04,785 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 23:20:04,786 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 23:20:04,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-14 23:20:05,879 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 23:20:06,038 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 23:20:06,039 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-14 23:20:06,044 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dfcc8a1f/6d137b95e0ab49d990cdbb4e4a14d58d/FLAG02d250be9 [2023-02-14 23:20:06,056 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dfcc8a1f/6d137b95e0ab49d990cdbb4e4a14d58d [2023-02-14 23:20:06,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 23:20:06,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 23:20:06,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 23:20:06,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 23:20:06,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 23:20:06,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f6261d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06, skipping insertion in model container [2023-02-14 23:20:06,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 23:20:06,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 23:20:06,181 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/in-de62.c[368,381] [2023-02-14 23:20:06,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:20:06,203 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 23:20:06,213 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/in-de62.c[368,381] [2023-02-14 23:20:06,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:20:06,229 INFO L208 MainTranslator]: Completed translation [2023-02-14 23:20:06,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06 WrapperNode [2023-02-14 23:20:06,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 23:20:06,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 23:20:06,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 23:20:06,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 23:20:06,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,260 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-02-14 23:20:06,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 23:20:06,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 23:20:06,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 23:20:06,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 23:20:06,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,281 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 23:20:06,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 23:20:06,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 23:20:06,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 23:20:06,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (1/1) ... [2023-02-14 23:20:06,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:20:06,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:06,320 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) [2023-02-14 23:20:06,321 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 [2023-02-14 23:20:06,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 23:20:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 23:20:06,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 23:20:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 23:20:06,403 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 23:20:06,405 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 23:20:06,522 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 23:20:06,527 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 23:20:06,527 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-14 23:20:06,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:20:06 BoogieIcfgContainer [2023-02-14 23:20:06,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 23:20:06,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 23:20:06,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 23:20:06,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 23:20:06,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:20:06" (1/3) ... [2023-02-14 23:20:06,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38237885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:20:06, skipping insertion in model container [2023-02-14 23:20:06,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:06" (2/3) ... [2023-02-14 23:20:06,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38237885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:20:06, skipping insertion in model container [2023-02-14 23:20:06,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:20:06" (3/3) ... [2023-02-14 23:20:06,537 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2023-02-14 23:20:06,552 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 23:20:06,552 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 23:20:06,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 23:20:06,606 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;@2f68d01f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 23:20:06,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 23:20:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 23:20:06,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:06,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:06,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2023-02-14 23:20:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:06,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572485952] [2023-02-14 23:20:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:06,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572485952] [2023-02-14 23:20:06,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572485952] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:20:06,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:20:06,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 23:20:06,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414693807] [2023-02-14 23:20:06,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:20:06,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 23:20:06,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:06,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 23:20:06,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:20:06,894 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:06,913 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2023-02-14 23:20:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 23:20:06,916 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-14 23:20:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:06,923 INFO L225 Difference]: With dead ends: 31 [2023-02-14 23:20:06,923 INFO L226 Difference]: Without dead ends: 13 [2023-02-14 23:20:06,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:20:06,932 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:06,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:20:06,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-14 23:20:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-14 23:20:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-02-14 23:20:06,966 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2023-02-14 23:20:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:06,967 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-02-14 23:20:06,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-02-14 23:20:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 23:20:06,969 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:06,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:06,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 23:20:06,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2023-02-14 23:20:06,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:06,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146094259] [2023-02-14 23:20:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:06,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:07,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:07,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146094259] [2023-02-14 23:20:07,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146094259] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:20:07,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:20:07,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 23:20:07,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605654697] [2023-02-14 23:20:07,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:20:07,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:20:07,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:20:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:20:07,214 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:07,282 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2023-02-14 23:20:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:20:07,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-14 23:20:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:07,284 INFO L225 Difference]: With dead ends: 27 [2023-02-14 23:20:07,284 INFO L226 Difference]: Without dead ends: 18 [2023-02-14 23:20:07,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:20:07,286 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:07,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:20:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-14 23:20:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-14 23:20:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2023-02-14 23:20:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2023-02-14 23:20:07,300 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2023-02-14 23:20:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:07,300 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2023-02-14 23:20:07,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2023-02-14 23:20:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 23:20:07,301 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:07,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:07,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 23:20:07,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:07,302 INFO L85 PathProgramCache]: Analyzing trace with hash 415981709, now seen corresponding path program 1 times [2023-02-14 23:20:07,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:07,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969599024] [2023-02-14 23:20:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:07,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969599024] [2023-02-14 23:20:07,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969599024] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:20:07,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:20:07,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 23:20:07,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229061808] [2023-02-14 23:20:07,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:20:07,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 23:20:07,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:07,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 23:20:07,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:20:07,338 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-02-14 23:20:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:07,366 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2023-02-14 23:20:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 23:20:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-14 23:20:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:07,367 INFO L225 Difference]: With dead ends: 41 [2023-02-14 23:20:07,367 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 23:20:07,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:20:07,369 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:07,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:20:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 23:20:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-14 23:20:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2023-02-14 23:20:07,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2023-02-14 23:20:07,380 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2023-02-14 23:20:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:07,380 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2023-02-14 23:20:07,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-02-14 23:20:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2023-02-14 23:20:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 23:20:07,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:07,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:07,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 23:20:07,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:07,383 INFO L85 PathProgramCache]: Analyzing trace with hash 461234238, now seen corresponding path program 1 times [2023-02-14 23:20:07,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:07,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700300595] [2023-02-14 23:20:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:07,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:07,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:07,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700300595] [2023-02-14 23:20:07,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700300595] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:20:07,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:20:07,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 23:20:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176140307] [2023-02-14 23:20:07,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:20:07,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 23:20:07,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 23:20:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:20:07,425 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-02-14 23:20:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:07,493 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-02-14 23:20:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 23:20:07,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-14 23:20:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:07,494 INFO L225 Difference]: With dead ends: 43 [2023-02-14 23:20:07,504 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 23:20:07,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:20:07,506 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:07,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:20:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 23:20:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-14 23:20:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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) [2023-02-14 23:20:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2023-02-14 23:20:07,519 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2023-02-14 23:20:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:07,520 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2023-02-14 23:20:07,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-02-14 23:20:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2023-02-14 23:20:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 23:20:07,521 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:07,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:07,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 23:20:07,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:07,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1348188691, now seen corresponding path program 1 times [2023-02-14 23:20:07,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:07,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880548959] [2023-02-14 23:20:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:07,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:07,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:07,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880548959] [2023-02-14 23:20:07,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880548959] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:20:07,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:20:07,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 23:20:07,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704590234] [2023-02-14 23:20:07,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:20:07,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:20:07,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:07,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:20:07,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:20:07,617 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-14 23:20:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:07,673 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-02-14 23:20:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:20:07,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-14 23:20:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:07,675 INFO L225 Difference]: With dead ends: 41 [2023-02-14 23:20:07,675 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 23:20:07,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:20:07,677 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:07,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:20:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 23:20:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-14 23:20:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 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) [2023-02-14 23:20:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2023-02-14 23:20:07,688 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2023-02-14 23:20:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:07,689 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2023-02-14 23:20:07,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-14 23:20:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2023-02-14 23:20:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 23:20:07,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:07,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:07,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 23:20:07,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash 121782348, now seen corresponding path program 1 times [2023-02-14 23:20:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:07,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650702626] [2023-02-14 23:20:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:07,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:07,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650702626] [2023-02-14 23:20:07,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650702626] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:07,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735622831] [2023-02-14 23:20:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:07,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:07,791 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) [2023-02-14 23:20:07,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 23:20:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:07,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 23:20:07,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:07,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:07,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735622831] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:07,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:20:07,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-02-14 23:20:07,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960266446] [2023-02-14 23:20:07,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:20:07,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:20:07,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:20:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 23:20:07,968 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-14 23:20:07,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:07,999 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-02-14 23:20:07,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:20:08,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-14 23:20:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:08,000 INFO L225 Difference]: With dead ends: 35 [2023-02-14 23:20:08,000 INFO L226 Difference]: Without dead ends: 25 [2023-02-14 23:20:08,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 23:20:08,002 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:08,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:20:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-14 23:20:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-14 23:20:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 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) [2023-02-14 23:20:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2023-02-14 23:20:08,021 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2023-02-14 23:20:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:08,021 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2023-02-14 23:20:08,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-14 23:20:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2023-02-14 23:20:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 23:20:08,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:08,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:08,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:08,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-14 23:20:08,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:08,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1019268824, now seen corresponding path program 1 times [2023-02-14 23:20:08,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:08,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123420435] [2023-02-14 23:20:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:08,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 23:20:08,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:08,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123420435] [2023-02-14 23:20:08,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123420435] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:08,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462771024] [2023-02-14 23:20:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:08,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:08,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:08,309 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) [2023-02-14 23:20:08,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 23:20:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:08,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 23:20:08,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:08,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 23:20:08,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462771024] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:08,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:08,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2023-02-14 23:20:08,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154552746] [2023-02-14 23:20:08,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:08,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 23:20:08,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:08,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 23:20:08,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:20:08,481 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2023-02-14 23:20:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:08,660 INFO L93 Difference]: Finished difference Result 103 states and 154 transitions. [2023-02-14 23:20:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 23:20:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-14 23:20:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:08,667 INFO L225 Difference]: With dead ends: 103 [2023-02-14 23:20:08,667 INFO L226 Difference]: Without dead ends: 86 [2023-02-14 23:20:08,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:20:08,669 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:08,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 74 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:20:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-14 23:20:08,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 53. [2023-02-14 23:20:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 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) [2023-02-14 23:20:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2023-02-14 23:20:08,684 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 16 [2023-02-14 23:20:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:08,684 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2023-02-14 23:20:08,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2023-02-14 23:20:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2023-02-14 23:20:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 23:20:08,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:08,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:08,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:08,891 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,SelfDestructingSolverStorable6 [2023-02-14 23:20:08,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1475655800, now seen corresponding path program 1 times [2023-02-14 23:20:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681865203] [2023-02-14 23:20:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:09,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:09,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681865203] [2023-02-14 23:20:09,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681865203] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:09,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415923529] [2023-02-14 23:20:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:09,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:09,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:09,013 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) [2023-02-14 23:20:09,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 23:20:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 23:20:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:09,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:09,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415923529] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:09,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:09,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-14 23:20:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240942890] [2023-02-14 23:20:09,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:09,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:20:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:20:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:20:09,111 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-02-14 23:20:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:09,166 INFO L93 Difference]: Finished difference Result 101 states and 144 transitions. [2023-02-14 23:20:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:20:09,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-14 23:20:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:09,168 INFO L225 Difference]: With dead ends: 101 [2023-02-14 23:20:09,168 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 23:20:09,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:20:09,169 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:09,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:20:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 23:20:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2023-02-14 23:20:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.5) internal successors, (96), 64 states have internal predecessors, (96), 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) [2023-02-14 23:20:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2023-02-14 23:20:09,189 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 16 [2023-02-14 23:20:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:09,190 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2023-02-14 23:20:09,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-02-14 23:20:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2023-02-14 23:20:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 23:20:09,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:09,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:09,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:09,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:09,396 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:09,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2038983293, now seen corresponding path program 1 times [2023-02-14 23:20:09,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:09,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477211630] [2023-02-14 23:20:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:09,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:09,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:09,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477211630] [2023-02-14 23:20:09,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477211630] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:09,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603997659] [2023-02-14 23:20:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:09,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:09,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:09,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:09,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 23:20:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:09,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 23:20:09,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 23:20:09,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 23:20:09,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603997659] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:09,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:09,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-02-14 23:20:09,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788505307] [2023-02-14 23:20:09,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:09,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 23:20:09,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 23:20:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:20:09,749 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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) [2023-02-14 23:20:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:09,951 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2023-02-14 23:20:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 23:20:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-14 23:20:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:09,952 INFO L225 Difference]: With dead ends: 141 [2023-02-14 23:20:09,952 INFO L226 Difference]: Without dead ends: 112 [2023-02-14 23:20:09,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-14 23:20:09,953 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:09,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 72 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:20:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-14 23:20:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2023-02-14 23:20:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 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) [2023-02-14 23:20:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2023-02-14 23:20:09,982 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 17 [2023-02-14 23:20:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:09,983 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2023-02-14 23:20:09,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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) [2023-02-14 23:20:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2023-02-14 23:20:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 23:20:09,984 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:09,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:09,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 23:20:10,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:10,189 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2023-02-14 23:20:10,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:10,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985549221] [2023-02-14 23:20:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:10,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:10,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:10,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985549221] [2023-02-14 23:20:10,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985549221] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:10,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785121907] [2023-02-14 23:20:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:10,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:10,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:10,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:10,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 23:20:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:10,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 23:20:10,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:20:10,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:20:10,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785121907] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:10,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:10,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-14 23:20:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12707581] [2023-02-14 23:20:10,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:10,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 23:20:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 23:20:10,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 23:20:10,458 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:10,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:10,533 INFO L93 Difference]: Finished difference Result 143 states and 207 transitions. [2023-02-14 23:20:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 23:20:10,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-14 23:20:10,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:10,534 INFO L225 Difference]: With dead ends: 143 [2023-02-14 23:20:10,534 INFO L226 Difference]: Without dead ends: 95 [2023-02-14 23:20:10,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 23:20:10,535 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 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 [2023-02-14 23:20:10,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:20:10,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-14 23:20:10,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-02-14 23:20:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.472972972972973) internal successors, (109), 74 states have internal predecessors, (109), 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) [2023-02-14 23:20:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2023-02-14 23:20:10,569 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 18 [2023-02-14 23:20:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:10,570 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2023-02-14 23:20:10,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2023-02-14 23:20:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 23:20:10,571 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:10,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:10,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 23:20:10,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 23:20:10,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:10,776 INFO L85 PathProgramCache]: Analyzing trace with hash 91906733, now seen corresponding path program 2 times [2023-02-14 23:20:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:10,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080992595] [2023-02-14 23:20:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 23:20:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:10,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080992595] [2023-02-14 23:20:10,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080992595] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097288061] [2023-02-14 23:20:10,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:20:10,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:10,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:10,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 23:20:10,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:20:10,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:10,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 23:20:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 23:20:10,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 23:20:11,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097288061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:11,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:11,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-14 23:20:11,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534484992] [2023-02-14 23:20:11,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:11,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 23:20:11,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:11,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 23:20:11,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:20:11,025 INFO L87 Difference]: Start difference. First operand 75 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:11,239 INFO L93 Difference]: Finished difference Result 138 states and 198 transitions. [2023-02-14 23:20:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 23:20:11,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-14 23:20:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:11,242 INFO L225 Difference]: With dead ends: 138 [2023-02-14 23:20:11,242 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 23:20:11,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-14 23:20:11,244 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:11,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 73 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:20:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 23:20:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2023-02-14 23:20:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 69 states have internal predecessors, (103), 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) [2023-02-14 23:20:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 103 transitions. [2023-02-14 23:20:11,275 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 103 transitions. Word has length 19 [2023-02-14 23:20:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:11,277 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 103 transitions. [2023-02-14 23:20:11,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 103 transitions. [2023-02-14 23:20:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 23:20:11,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:11,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:11,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:11,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:11,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1779216382, now seen corresponding path program 2 times [2023-02-14 23:20:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:11,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002838918] [2023-02-14 23:20:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:11,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:11,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002838918] [2023-02-14 23:20:11,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002838918] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137077414] [2023-02-14 23:20:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:20:11,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:11,626 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:11,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 23:20:11,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:20:11,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:11,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 23:20:11,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:20:11,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:20:11,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137077414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:11,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:11,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-14 23:20:11,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748629937] [2023-02-14 23:20:11,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:11,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 23:20:11,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:11,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 23:20:11,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-14 23:20:11,731 INFO L87 Difference]: Start difference. First operand 70 states and 103 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2023-02-14 23:20:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:12,285 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2023-02-14 23:20:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 23:20:12,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-14 23:20:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:12,286 INFO L225 Difference]: With dead ends: 186 [2023-02-14 23:20:12,286 INFO L226 Difference]: Without dead ends: 152 [2023-02-14 23:20:12,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 23:20:12,288 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:12,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 139 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:20:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-14 23:20:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 89. [2023-02-14 23:20:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 88 states have internal predecessors, (120), 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) [2023-02-14 23:20:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2023-02-14 23:20:12,320 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 19 [2023-02-14 23:20:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:12,320 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2023-02-14 23:20:12,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2023-02-14 23:20:12,320 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2023-02-14 23:20:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 23:20:12,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:12,321 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:12,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 23:20:12,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:12,526 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2078405228, now seen corresponding path program 3 times [2023-02-14 23:20:12,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:12,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350903143] [2023-02-14 23:20:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:12,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 23:20:12,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350903143] [2023-02-14 23:20:12,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350903143] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:12,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369751254] [2023-02-14 23:20:12,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:20:12,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:12,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:12,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:12,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 23:20:12,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 23:20:12,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 23:20:12,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 23:20:12,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 23:20:12,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369751254] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:12,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:12,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2023-02-14 23:20:12,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051583794] [2023-02-14 23:20:12,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:12,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 23:20:12,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 23:20:12,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:20:12,797 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2023-02-14 23:20:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:13,362 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2023-02-14 23:20:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 23:20:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-14 23:20:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:13,363 INFO L225 Difference]: With dead ends: 208 [2023-02-14 23:20:13,363 INFO L226 Difference]: Without dead ends: 141 [2023-02-14 23:20:13,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 23:20:13,364 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:13,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 182 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:20:13,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-14 23:20:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2023-02-14 23:20:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 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) [2023-02-14 23:20:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2023-02-14 23:20:13,393 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 21 [2023-02-14 23:20:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:13,393 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2023-02-14 23:20:13,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2023-02-14 23:20:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2023-02-14 23:20:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 23:20:13,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:13,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:13,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:13,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 23:20:13,606 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:13,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:13,606 INFO L85 PathProgramCache]: Analyzing trace with hash 856330056, now seen corresponding path program 3 times [2023-02-14 23:20:13,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:13,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932653120] [2023-02-14 23:20:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:13,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:13,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:13,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932653120] [2023-02-14 23:20:13,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932653120] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:13,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646700859] [2023-02-14 23:20:13,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:20:13,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:13,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:13,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:13,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 23:20:13,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:20:13,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:13,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 23:20:13,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:13,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 23:20:14,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646700859] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:14,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:14,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 23 [2023-02-14 23:20:14,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118405207] [2023-02-14 23:20:14,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:14,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 23:20:14,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:14,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 23:20:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2023-02-14 23:20:14,138 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2023-02-14 23:20:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:15,174 INFO L93 Difference]: Finished difference Result 183 states and 269 transitions. [2023-02-14 23:20:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-14 23:20:15,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-14 23:20:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:15,176 INFO L225 Difference]: With dead ends: 183 [2023-02-14 23:20:15,176 INFO L226 Difference]: Without dead ends: 147 [2023-02-14 23:20:15,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 23:20:15,178 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:15,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 147 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:20:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-14 23:20:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2023-02-14 23:20:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3666666666666667) internal successors, (164), 120 states have internal predecessors, (164), 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) [2023-02-14 23:20:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 164 transitions. [2023-02-14 23:20:15,216 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 164 transitions. Word has length 22 [2023-02-14 23:20:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:15,216 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 164 transitions. [2023-02-14 23:20:15,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2023-02-14 23:20:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 164 transitions. [2023-02-14 23:20:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 23:20:15,218 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:15,218 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:15,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:15,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 23:20:15,423 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1531208008, now seen corresponding path program 4 times [2023-02-14 23:20:15,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:15,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293091265] [2023-02-14 23:20:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:20:15,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:15,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293091265] [2023-02-14 23:20:15,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293091265] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:15,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755189654] [2023-02-14 23:20:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:20:15,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:15,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:15,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:15,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 23:20:15,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:20:15,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 23:20:15,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 23:20:15,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 23:20:15,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755189654] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:15,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:15,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2023-02-14 23:20:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620244042] [2023-02-14 23:20:15,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:15,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 23:20:15,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 23:20:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-02-14 23:20:15,770 INFO L87 Difference]: Start difference. First operand 121 states and 164 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2023-02-14 23:20:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:17,589 INFO L93 Difference]: Finished difference Result 421 states and 594 transitions. [2023-02-14 23:20:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-14 23:20:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-14 23:20:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:17,591 INFO L225 Difference]: With dead ends: 421 [2023-02-14 23:20:17,591 INFO L226 Difference]: Without dead ends: 349 [2023-02-14 23:20:17,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=534, Invalid=5318, Unknown=0, NotChecked=0, Total=5852 [2023-02-14 23:20:17,594 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 208 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:17,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 355 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 23:20:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-02-14 23:20:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 168. [2023-02-14 23:20:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3832335329341316) internal successors, (231), 167 states have internal predecessors, (231), 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) [2023-02-14 23:20:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 231 transitions. [2023-02-14 23:20:17,640 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 231 transitions. Word has length 22 [2023-02-14 23:20:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:17,641 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 231 transitions. [2023-02-14 23:20:17,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2023-02-14 23:20:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 231 transitions. [2023-02-14 23:20:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 23:20:17,641 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:17,641 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:17,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:17,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 23:20:17,847 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:17,847 INFO L85 PathProgramCache]: Analyzing trace with hash -425830760, now seen corresponding path program 2 times [2023-02-14 23:20:17,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:17,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82470628] [2023-02-14 23:20:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:17,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 23:20:17,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82470628] [2023-02-14 23:20:17,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82470628] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:17,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509823707] [2023-02-14 23:20:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:20:17,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:17,989 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:17,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 23:20:18,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:20:18,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:18,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 23:20:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:18,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 23:20:18,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509823707] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:18,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:18,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 7] total 19 [2023-02-14 23:20:18,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537714585] [2023-02-14 23:20:18,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:18,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 23:20:18,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 23:20:18,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-02-14 23:20:18,253 INFO L87 Difference]: Start difference. First operand 168 states and 231 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2023-02-14 23:20:18,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:18,656 INFO L93 Difference]: Finished difference Result 378 states and 564 transitions. [2023-02-14 23:20:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 23:20:18,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-14 23:20:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:18,658 INFO L225 Difference]: With dead ends: 378 [2023-02-14 23:20:18,658 INFO L226 Difference]: Without dead ends: 303 [2023-02-14 23:20:18,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2023-02-14 23:20:18,659 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 119 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:18,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 270 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:20:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-02-14 23:20:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 207. [2023-02-14 23:20:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3737864077669903) internal successors, (283), 206 states have internal predecessors, (283), 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) [2023-02-14 23:20:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 283 transitions. [2023-02-14 23:20:18,718 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 283 transitions. Word has length 24 [2023-02-14 23:20:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:18,718 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 283 transitions. [2023-02-14 23:20:18,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2023-02-14 23:20:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 283 transitions. [2023-02-14 23:20:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 23:20:18,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:18,719 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:18,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:18,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 23:20:18,924 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1713191597, now seen corresponding path program 4 times [2023-02-14 23:20:18,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:18,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959369897] [2023-02-14 23:20:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 23:20:19,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:19,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959369897] [2023-02-14 23:20:19,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959369897] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:19,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240840808] [2023-02-14 23:20:19,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:20:19,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:19,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:19,099 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:19,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 23:20:19,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:20:19,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:19,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 23:20:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 23:20:19,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 23:20:19,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240840808] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:19,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:19,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-14 23:20:19,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843582001] [2023-02-14 23:20:19,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:19,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 23:20:19,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:19,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 23:20:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-14 23:20:19,241 INFO L87 Difference]: Start difference. First operand 207 states and 283 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2023-02-14 23:20:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:20,449 INFO L93 Difference]: Finished difference Result 494 states and 651 transitions. [2023-02-14 23:20:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-14 23:20:20,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-14 23:20:20,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:20,451 INFO L225 Difference]: With dead ends: 494 [2023-02-14 23:20:20,451 INFO L226 Difference]: Without dead ends: 433 [2023-02-14 23:20:20,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=3785, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 23:20:20,453 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 213 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:20,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 216 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:20:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-02-14 23:20:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 207. [2023-02-14 23:20:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3640776699029127) internal successors, (281), 206 states have internal predecessors, (281), 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) [2023-02-14 23:20:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2023-02-14 23:20:20,519 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 25 [2023-02-14 23:20:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:20,520 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2023-02-14 23:20:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2023-02-14 23:20:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2023-02-14 23:20:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 23:20:20,521 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:20,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:20,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:20,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 23:20:20,726 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash -235040834, now seen corresponding path program 5 times [2023-02-14 23:20:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:20,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772623795] [2023-02-14 23:20:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:20,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:20,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772623795] [2023-02-14 23:20:20,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772623795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:20,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970182600] [2023-02-14 23:20:20,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:20:20,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:20,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:20,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:20,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 23:20:21,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-14 23:20:21,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 23:20:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:21,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 23:20:21,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970182600] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:21,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:21,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 28 [2023-02-14 23:20:21,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368213804] [2023-02-14 23:20:21,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:21,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 23:20:21,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 23:20:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2023-02-14 23:20:21,345 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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) [2023-02-14 23:20:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:22,647 INFO L93 Difference]: Finished difference Result 413 states and 608 transitions. [2023-02-14 23:20:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-14 23:20:22,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-14 23:20:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:22,648 INFO L225 Difference]: With dead ends: 413 [2023-02-14 23:20:22,649 INFO L226 Difference]: Without dead ends: 354 [2023-02-14 23:20:22,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1036, Invalid=3254, Unknown=0, NotChecked=0, Total=4290 [2023-02-14 23:20:22,650 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 219 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:22,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 221 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:20:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-02-14 23:20:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 243. [2023-02-14 23:20:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.359504132231405) internal successors, (329), 242 states have internal predecessors, (329), 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) [2023-02-14 23:20:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 329 transitions. [2023-02-14 23:20:22,723 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 329 transitions. Word has length 25 [2023-02-14 23:20:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:22,723 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 329 transitions. [2023-02-14 23:20:22,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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) [2023-02-14 23:20:22,723 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 329 transitions. [2023-02-14 23:20:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 23:20:22,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:22,724 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:22,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:22,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 23:20:22,925 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:22,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1282371252, now seen corresponding path program 6 times [2023-02-14 23:20:22,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:22,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154859956] [2023-02-14 23:20:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 23:20:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:23,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154859956] [2023-02-14 23:20:23,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154859956] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:23,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314651966] [2023-02-14 23:20:23,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 23:20:23,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:23,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:23,109 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:23,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 23:20:23,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-14 23:20:23,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:23,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 23:20:23,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 23:20:23,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 23:20:23,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314651966] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:23,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:23,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-14 23:20:23,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545287868] [2023-02-14 23:20:23,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:23,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 23:20:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:23,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 23:20:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2023-02-14 23:20:23,276 INFO L87 Difference]: Start difference. First operand 243 states and 329 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2023-02-14 23:20:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:26,201 INFO L93 Difference]: Finished difference Result 726 states and 927 transitions. [2023-02-14 23:20:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-14 23:20:26,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-14 23:20:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:26,203 INFO L225 Difference]: With dead ends: 726 [2023-02-14 23:20:26,204 INFO L226 Difference]: Without dead ends: 661 [2023-02-14 23:20:26,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3853 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=960, Invalid=10170, Unknown=0, NotChecked=0, Total=11130 [2023-02-14 23:20:26,207 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 303 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:26,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 374 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 23:20:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-02-14 23:20:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 258. [2023-02-14 23:20:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.3579766536964981) internal successors, (349), 257 states have internal predecessors, (349), 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) [2023-02-14 23:20:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 349 transitions. [2023-02-14 23:20:26,299 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 349 transitions. Word has length 27 [2023-02-14 23:20:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:26,299 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 349 transitions. [2023-02-14 23:20:26,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2023-02-14 23:20:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 349 transitions. [2023-02-14 23:20:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 23:20:26,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:26,300 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:26,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:26,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:26,505 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:26,505 INFO L85 PathProgramCache]: Analyzing trace with hash -866986772, now seen corresponding path program 1 times [2023-02-14 23:20:26,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:26,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530765919] [2023-02-14 23:20:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:26,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 23:20:26,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:26,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530765919] [2023-02-14 23:20:26,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530765919] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:26,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525491816] [2023-02-14 23:20:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:26,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:26,687 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:26,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 23:20:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:26,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 23:20:26,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 23:20:26,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 23:20:26,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525491816] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:26,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:26,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 5] total 16 [2023-02-14 23:20:26,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160895212] [2023-02-14 23:20:26,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:26,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 23:20:26,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 23:20:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-02-14 23:20:26,837 INFO L87 Difference]: Start difference. First operand 258 states and 349 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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) [2023-02-14 23:20:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:27,358 INFO L93 Difference]: Finished difference Result 520 states and 765 transitions. [2023-02-14 23:20:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 23:20:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-14 23:20:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:27,359 INFO L225 Difference]: With dead ends: 520 [2023-02-14 23:20:27,360 INFO L226 Difference]: Without dead ends: 457 [2023-02-14 23:20:27,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2023-02-14 23:20:27,360 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 111 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:27,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 375 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:20:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-02-14 23:20:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 320. [2023-02-14 23:20:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.3573667711598747) internal successors, (433), 319 states have internal predecessors, (433), 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) [2023-02-14 23:20:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 433 transitions. [2023-02-14 23:20:27,449 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 433 transitions. Word has length 27 [2023-02-14 23:20:27,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:27,450 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 433 transitions. [2023-02-14 23:20:27,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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) [2023-02-14 23:20:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 433 transitions. [2023-02-14 23:20:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 23:20:27,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:27,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:27,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:27,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:27,656 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash 967140136, now seen corresponding path program 3 times [2023-02-14 23:20:27,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:27,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308056374] [2023-02-14 23:20:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:27,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 23:20:27,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:27,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308056374] [2023-02-14 23:20:27,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308056374] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537425269] [2023-02-14 23:20:27,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:20:27,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:27,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:27,763 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:27,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 23:20:27,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:20:27,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 23:20:27,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 23:20:27,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 23:20:27,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537425269] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:27,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:27,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-02-14 23:20:27,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462348913] [2023-02-14 23:20:27,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:27,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 23:20:27,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 23:20:27,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 23:20:27,899 INFO L87 Difference]: Start difference. First operand 320 states and 433 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2023-02-14 23:20:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:28,350 INFO L93 Difference]: Finished difference Result 521 states and 677 transitions. [2023-02-14 23:20:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 23:20:28,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-14 23:20:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:28,352 INFO L225 Difference]: With dead ends: 521 [2023-02-14 23:20:28,353 INFO L226 Difference]: Without dead ends: 494 [2023-02-14 23:20:28,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-14 23:20:28,353 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:28,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 101 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:20:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-02-14 23:20:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 325. [2023-02-14 23:20:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.3487654320987654) internal successors, (437), 324 states have internal predecessors, (437), 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) [2023-02-14 23:20:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 437 transitions. [2023-02-14 23:20:28,467 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 437 transitions. Word has length 28 [2023-02-14 23:20:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:28,467 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 437 transitions. [2023-02-14 23:20:28,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2023-02-14 23:20:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 437 transitions. [2023-02-14 23:20:28,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 23:20:28,468 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:28,468 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:28,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:28,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:28,671 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash -18086136, now seen corresponding path program 7 times [2023-02-14 23:20:28,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:28,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251930912] [2023-02-14 23:20:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:28,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:28,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:28,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251930912] [2023-02-14 23:20:28,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251930912] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:28,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075964062] [2023-02-14 23:20:28,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 23:20:28,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:28,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:28,901 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:28,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 23:20:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 23:20:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 23:20:29,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 23:20:29,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075964062] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:29,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:29,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-02-14 23:20:29,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219840927] [2023-02-14 23:20:29,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:29,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 23:20:29,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 23:20:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2023-02-14 23:20:29,114 INFO L87 Difference]: Start difference. First operand 325 states and 437 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2023-02-14 23:20:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:37,813 INFO L93 Difference]: Finished difference Result 1049 states and 1343 transitions. [2023-02-14 23:20:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-02-14 23:20:37,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-14 23:20:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:37,817 INFO L225 Difference]: With dead ends: 1049 [2023-02-14 23:20:37,817 INFO L226 Difference]: Without dead ends: 984 [2023-02-14 23:20:37,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14594 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2296, Invalid=34376, Unknown=0, NotChecked=0, Total=36672 [2023-02-14 23:20:37,825 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 579 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:37,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 465 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-14 23:20:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2023-02-14 23:20:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 356. [2023-02-14 23:20:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.3549295774647887) internal successors, (481), 355 states have internal predecessors, (481), 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) [2023-02-14 23:20:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2023-02-14 23:20:37,975 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 28 [2023-02-14 23:20:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:37,975 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2023-02-14 23:20:37,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2023-02-14 23:20:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2023-02-14 23:20:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 23:20:37,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:37,976 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:37,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:38,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:38,182 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:38,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2063179469, now seen corresponding path program 4 times [2023-02-14 23:20:38,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:38,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505655845] [2023-02-14 23:20:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:38,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 23:20:38,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:38,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505655845] [2023-02-14 23:20:38,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505655845] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:38,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694006232] [2023-02-14 23:20:38,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:20:38,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:38,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:38,377 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:38,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 23:20:38,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:20:38,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:38,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 23:20:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 23:20:38,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-14 23:20:38,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694006232] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:38,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:38,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 5] total 17 [2023-02-14 23:20:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188774116] [2023-02-14 23:20:38,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:38,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 23:20:38,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 23:20:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-14 23:20:38,552 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2023-02-14 23:20:39,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:39,237 INFO L93 Difference]: Finished difference Result 665 states and 975 transitions. [2023-02-14 23:20:39,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 23:20:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-14 23:20:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:39,239 INFO L225 Difference]: With dead ends: 665 [2023-02-14 23:20:39,239 INFO L226 Difference]: Without dead ends: 587 [2023-02-14 23:20:39,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2023-02-14 23:20:39,240 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 145 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:39,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 467 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:20:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2023-02-14 23:20:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 347. [2023-02-14 23:20:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.3728323699421965) internal successors, (475), 346 states have internal predecessors, (475), 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) [2023-02-14 23:20:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 475 transitions. [2023-02-14 23:20:39,400 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 475 transitions. Word has length 29 [2023-02-14 23:20:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:39,400 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 475 transitions. [2023-02-14 23:20:39,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2023-02-14 23:20:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 475 transitions. [2023-02-14 23:20:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 23:20:39,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:39,401 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:39,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:39,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:39,606 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 5 times [2023-02-14 23:20:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:39,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042978467] [2023-02-14 23:20:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:39,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 23:20:39,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042978467] [2023-02-14 23:20:39,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042978467] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689278457] [2023-02-14 23:20:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:20:39,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:39,799 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:39,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 23:20:39,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-14 23:20:39,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:39,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 23:20:39,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 23:20:40,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 23:20:40,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689278457] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:40,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:40,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-02-14 23:20:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419393849] [2023-02-14 23:20:40,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:40,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 23:20:40,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 23:20:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-14 23:20:40,064 INFO L87 Difference]: Start difference. First operand 347 states and 475 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:40,579 INFO L93 Difference]: Finished difference Result 577 states and 777 transitions. [2023-02-14 23:20:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 23:20:40,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-14 23:20:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:40,581 INFO L225 Difference]: With dead ends: 577 [2023-02-14 23:20:40,581 INFO L226 Difference]: Without dead ends: 462 [2023-02-14 23:20:40,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:20:40,582 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:40,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 152 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:20:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-02-14 23:20:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 340. [2023-02-14 23:20:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3716814159292035) internal successors, (465), 339 states have internal predecessors, (465), 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) [2023-02-14 23:20:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 465 transitions. [2023-02-14 23:20:40,798 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 465 transitions. Word has length 30 [2023-02-14 23:20:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:40,798 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 465 transitions. [2023-02-14 23:20:40,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:20:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 465 transitions. [2023-02-14 23:20:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 23:20:40,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:40,801 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:40,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:41,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:41,006 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1329509959, now seen corresponding path program 6 times [2023-02-14 23:20:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:41,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053275553] [2023-02-14 23:20:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:41,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 23:20:41,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:41,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053275553] [2023-02-14 23:20:41,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053275553] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:41,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577273674] [2023-02-14 23:20:41,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 23:20:41,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:41,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:41,205 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:41,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 23:20:41,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-14 23:20:41,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:41,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 23:20:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 23:20:41,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 23:20:41,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577273674] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:41,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:41,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-02-14 23:20:41,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592931179] [2023-02-14 23:20:41,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:41,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 23:20:41,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 23:20:41,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-14 23:20:41,384 INFO L87 Difference]: Start difference. First operand 340 states and 465 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2023-02-14 23:20:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:42,409 INFO L93 Difference]: Finished difference Result 712 states and 937 transitions. [2023-02-14 23:20:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 23:20:42,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-14 23:20:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:42,412 INFO L225 Difference]: With dead ends: 712 [2023-02-14 23:20:42,412 INFO L226 Difference]: Without dead ends: 650 [2023-02-14 23:20:42,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-02-14 23:20:42,413 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 133 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:42,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 231 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:20:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2023-02-14 23:20:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 369. [2023-02-14 23:20:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.3423913043478262) internal successors, (494), 368 states have internal predecessors, (494), 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) [2023-02-14 23:20:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 494 transitions. [2023-02-14 23:20:42,612 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 494 transitions. Word has length 30 [2023-02-14 23:20:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:42,612 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 494 transitions. [2023-02-14 23:20:42,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2023-02-14 23:20:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 494 transitions. [2023-02-14 23:20:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 23:20:42,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:42,614 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:42,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-14 23:20:42,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-14 23:20:42,818 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:42,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:42,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1974452903, now seen corresponding path program 5 times [2023-02-14 23:20:42,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:42,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230304721] [2023-02-14 23:20:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:42,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 23:20:42,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:42,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230304721] [2023-02-14 23:20:42,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230304721] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:42,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476937235] [2023-02-14 23:20:42,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:20:42,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:42,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:42,973 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:42,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 23:20:43,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 23:20:43,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 23:20:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 23:20:43,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 23:20:43,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476937235] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:43,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:43,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2023-02-14 23:20:43,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822860723] [2023-02-14 23:20:43,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:43,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 23:20:43,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:43,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 23:20:43,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-02-14 23:20:43,380 INFO L87 Difference]: Start difference. First operand 369 states and 494 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 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) [2023-02-14 23:20:44,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:20:44,626 INFO L93 Difference]: Finished difference Result 555 states and 751 transitions. [2023-02-14 23:20:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-14 23:20:44,626 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-14 23:20:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:20:44,627 INFO L225 Difference]: With dead ends: 555 [2023-02-14 23:20:44,628 INFO L226 Difference]: Without dead ends: 432 [2023-02-14 23:20:44,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 23:20:44,628 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 100 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:20:44,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 309 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:20:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-02-14 23:20:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 350. [2023-02-14 23:20:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.33810888252149) internal successors, (467), 349 states have internal predecessors, (467), 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) [2023-02-14 23:20:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 467 transitions. [2023-02-14 23:20:44,831 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 467 transitions. Word has length 30 [2023-02-14 23:20:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:20:44,832 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 467 transitions. [2023-02-14 23:20:44,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 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) [2023-02-14 23:20:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 467 transitions. [2023-02-14 23:20:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 23:20:44,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:20:44,833 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:20:44,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 23:20:45,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-14 23:20:45,044 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:20:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:20:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1370456194, now seen corresponding path program 8 times [2023-02-14 23:20:45,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:20:45,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902544938] [2023-02-14 23:20:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:20:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:20:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:20:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:20:45,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:20:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902544938] [2023-02-14 23:20:45,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902544938] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:20:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063970944] [2023-02-14 23:20:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:20:45,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:20:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:20:45,317 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:20:45,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 23:20:45,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:20:45,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:20:45,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 23:20:45,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:20:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 23:20:45,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:20:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 23:20:45,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063970944] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:20:45,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:20:45,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-14 23:20:45,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380534457] [2023-02-14 23:20:45,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:20:45,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 23:20:45,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:20:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 23:20:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-02-14 23:20:45,563 INFO L87 Difference]: Start difference. First operand 350 states and 467 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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) [2023-02-14 23:21:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:21:01,934 INFO L93 Difference]: Finished difference Result 1250 states and 1586 transitions. [2023-02-14 23:21:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2023-02-14 23:21:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-14 23:21:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:21:01,937 INFO L225 Difference]: With dead ends: 1250 [2023-02-14 23:21:01,937 INFO L226 Difference]: Without dead ends: 1170 [2023-02-14 23:21:01,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25149 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3342, Invalid=57914, Unknown=0, NotChecked=0, Total=61256 [2023-02-14 23:21:01,941 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 665 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 3576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-14 23:21:01,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 700 Invalid, 3576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-14 23:21:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2023-02-14 23:21:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 409. [2023-02-14 23:21:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.3333333333333333) internal successors, (544), 408 states have internal predecessors, (544), 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) [2023-02-14 23:21:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 544 transitions. [2023-02-14 23:21:02,219 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 544 transitions. Word has length 31 [2023-02-14 23:21:02,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:21:02,219 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 544 transitions. [2023-02-14 23:21:02,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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) [2023-02-14 23:21:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 544 transitions. [2023-02-14 23:21:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 23:21:02,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:21:02,220 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:21:02,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 23:21:02,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-14 23:21:02,425 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:21:02,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:21:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash 306595180, now seen corresponding path program 2 times [2023-02-14 23:21:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:21:02,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133459644] [2023-02-14 23:21:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:21:02,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:21:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:21:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 23:21:02,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:21:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133459644] [2023-02-14 23:21:02,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133459644] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:21:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785949795] [2023-02-14 23:21:02,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:21:02,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:02,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:21:02,673 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:21:02,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 23:21:02,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:21:02,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:21:02,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 23:21:02,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:21:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 23:21:02,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:21:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-02-14 23:21:02,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785949795] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:21:02,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:21:02,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 25 [2023-02-14 23:21:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498294887] [2023-02-14 23:21:02,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:21:02,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 23:21:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:21:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 23:21:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2023-02-14 23:21:02,961 INFO L87 Difference]: Start difference. First operand 409 states and 544 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 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) [2023-02-14 23:21:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:21:03,971 INFO L93 Difference]: Finished difference Result 793 states and 1152 transitions. [2023-02-14 23:21:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 23:21:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-14 23:21:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:21:03,974 INFO L225 Difference]: With dead ends: 793 [2023-02-14 23:21:03,974 INFO L226 Difference]: Without dead ends: 688 [2023-02-14 23:21:03,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 23:21:03,975 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 202 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:21:03,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 612 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:21:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-02-14 23:21:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 456. [2023-02-14 23:21:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.3296703296703296) internal successors, (605), 455 states have internal predecessors, (605), 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) [2023-02-14 23:21:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 605 transitions. [2023-02-14 23:21:04,250 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 605 transitions. Word has length 31 [2023-02-14 23:21:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:21:04,250 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 605 transitions. [2023-02-14 23:21:04,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 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) [2023-02-14 23:21:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 605 transitions. [2023-02-14 23:21:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 23:21:04,251 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:21:04,251 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:21:04,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-14 23:21:04,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:04,456 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:21:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:21:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash 541073756, now seen corresponding path program 3 times [2023-02-14 23:21:04,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:21:04,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526313805] [2023-02-14 23:21:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:21:04,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:21:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:21:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 23:21:04,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:21:04,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526313805] [2023-02-14 23:21:04,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526313805] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:21:04,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487620358] [2023-02-14 23:21:04,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:21:04,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:04,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:21:04,703 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:21:04,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-14 23:21:04,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:21:04,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:21:04,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 23:21:04,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:21:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-14 23:21:04,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:21:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-14 23:21:04,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487620358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:21:04,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:21:04,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 21 [2023-02-14 23:21:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189822735] [2023-02-14 23:21:04,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:21:04,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 23:21:04,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:21:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 23:21:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-02-14 23:21:04,852 INFO L87 Difference]: Start difference. First operand 456 states and 605 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2023-02-14 23:21:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:21:07,518 INFO L93 Difference]: Finished difference Result 834 states and 1179 transitions. [2023-02-14 23:21:07,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-14 23:21:07,519 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-14 23:21:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:21:07,520 INFO L225 Difference]: With dead ends: 834 [2023-02-14 23:21:07,520 INFO L226 Difference]: Without dead ends: 636 [2023-02-14 23:21:07,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=784, Invalid=8918, Unknown=0, NotChecked=0, Total=9702 [2023-02-14 23:21:07,521 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 150 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:21:07,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 526 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 23:21:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2023-02-14 23:21:07,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 471. [2023-02-14 23:21:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.325531914893617) internal successors, (623), 470 states have internal predecessors, (623), 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) [2023-02-14 23:21:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 623 transitions. [2023-02-14 23:21:07,853 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 623 transitions. Word has length 33 [2023-02-14 23:21:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:21:07,853 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 623 transitions. [2023-02-14 23:21:07,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2023-02-14 23:21:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 623 transitions. [2023-02-14 23:21:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 23:21:07,854 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:21:07,854 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:21:07,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-14 23:21:08,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-14 23:21:08,060 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:21:08,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:21:08,060 INFO L85 PathProgramCache]: Analyzing trace with hash 89661625, now seen corresponding path program 6 times [2023-02-14 23:21:08,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:21:08,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312108009] [2023-02-14 23:21:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:21:08,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:21:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:21:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 23:21:08,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:21:08,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312108009] [2023-02-14 23:21:08,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312108009] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:21:08,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566768054] [2023-02-14 23:21:08,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 23:21:08,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:08,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:21:08,316 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:21:08,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-14 23:21:08,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-14 23:21:08,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:21:08,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 23:21:08,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:21:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 23:21:08,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:21:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 23:21:08,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566768054] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:21:08,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:21:08,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-14 23:21:08,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198461308] [2023-02-14 23:21:08,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:21:08,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 23:21:08,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:21:08,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 23:21:08,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2023-02-14 23:21:08,582 INFO L87 Difference]: Start difference. First operand 471 states and 623 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2023-02-14 23:21:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:21:23,277 INFO L93 Difference]: Finished difference Result 1586 states and 1925 transitions. [2023-02-14 23:21:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2023-02-14 23:21:23,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-14 23:21:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:21:23,281 INFO L225 Difference]: With dead ends: 1586 [2023-02-14 23:21:23,281 INFO L226 Difference]: Without dead ends: 1473 [2023-02-14 23:21:23,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25302 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3464, Invalid=57792, Unknown=0, NotChecked=0, Total=61256 [2023-02-14 23:21:23,283 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 693 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-14 23:21:23,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 699 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-14 23:21:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2023-02-14 23:21:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 433. [2023-02-14 23:21:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.337962962962963) internal successors, (578), 432 states have internal predecessors, (578), 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) [2023-02-14 23:21:23,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 578 transitions. [2023-02-14 23:21:23,573 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 578 transitions. Word has length 34 [2023-02-14 23:21:23,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:21:23,573 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 578 transitions. [2023-02-14 23:21:23,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2023-02-14 23:21:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 578 transitions. [2023-02-14 23:21:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 23:21:23,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:21:23,575 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:21:23,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-14 23:21:23,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:23,780 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:21:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:21:23,780 INFO L85 PathProgramCache]: Analyzing trace with hash 386903752, now seen corresponding path program 9 times [2023-02-14 23:21:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:21:23,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020193737] [2023-02-14 23:21:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:21:23,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:21:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:21:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:21:24,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:21:24,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020193737] [2023-02-14 23:21:24,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020193737] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:21:24,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210008341] [2023-02-14 23:21:24,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:21:24,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:21:24,125 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:21:24,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-14 23:21:24,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 23:21:24,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:21:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 23:21:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:21:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:21:24,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:21:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 23:21:24,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210008341] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:21:24,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:21:24,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 17] total 43 [2023-02-14 23:21:24,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810685402] [2023-02-14 23:21:24,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:21:24,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 23:21:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:21:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 23:21:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 23:21:24,936 INFO L87 Difference]: Start difference. First operand 433 states and 578 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 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) [2023-02-14 23:21:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:21:31,531 INFO L93 Difference]: Finished difference Result 875 states and 1307 transitions. [2023-02-14 23:21:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-02-14 23:21:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-14 23:21:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:21:31,534 INFO L225 Difference]: With dead ends: 875 [2023-02-14 23:21:31,534 INFO L226 Difference]: Without dead ends: 790 [2023-02-14 23:21:31,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4175, Invalid=13647, Unknown=0, NotChecked=0, Total=17822 [2023-02-14 23:21:31,536 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 554 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 3671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 23:21:31,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 707 Invalid, 3671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-14 23:21:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-02-14 23:21:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 510. [2023-02-14 23:21:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.343811394891945) internal successors, (684), 509 states have internal predecessors, (684), 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) [2023-02-14 23:21:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2023-02-14 23:21:32,019 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 34 [2023-02-14 23:21:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:21:32,019 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2023-02-14 23:21:32,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 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) [2023-02-14 23:21:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2023-02-14 23:21:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 23:21:32,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:21:32,021 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:21:32,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-14 23:21:32,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-02-14 23:21:32,226 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:21:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:21:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash -557084594, now seen corresponding path program 4 times [2023-02-14 23:21:32,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:21:32,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422412300] [2023-02-14 23:21:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:21:32,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:21:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:21:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 23:21:32,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:21:32,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422412300] [2023-02-14 23:21:32,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422412300] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:21:32,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948763426] [2023-02-14 23:21:32,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:21:32,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:32,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:21:32,508 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:21:32,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-14 23:21:32,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:21:32,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:21:32,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-14 23:21:32,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:21:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 23:21:32,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:21:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-14 23:21:32,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948763426] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:21:32,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:21:32,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 6] total 22 [2023-02-14 23:21:32,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000262394] [2023-02-14 23:21:32,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:21:32,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 23:21:32,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:21:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 23:21:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-02-14 23:21:32,692 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 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) [2023-02-14 23:21:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:21:34,029 INFO L93 Difference]: Finished difference Result 971 states and 1415 transitions. [2023-02-14 23:21:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 23:21:34,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-14 23:21:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:21:34,031 INFO L225 Difference]: With dead ends: 971 [2023-02-14 23:21:34,031 INFO L226 Difference]: Without dead ends: 860 [2023-02-14 23:21:34,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=1011, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 23:21:34,032 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 247 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:21:34,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 776 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:21:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-02-14 23:21:34,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 586. [2023-02-14 23:21:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.34017094017094) internal successors, (784), 585 states have internal predecessors, (784), 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) [2023-02-14 23:21:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 784 transitions. [2023-02-14 23:21:34,453 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 784 transitions. Word has length 35 [2023-02-14 23:21:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:21:34,453 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 784 transitions. [2023-02-14 23:21:34,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 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) [2023-02-14 23:21:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 784 transitions. [2023-02-14 23:21:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 23:21:34,454 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:21:34,454 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:21:34,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-14 23:21:34,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:34,655 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:21:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:21:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 7 times [2023-02-14 23:21:34,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:21:34,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136948464] [2023-02-14 23:21:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:21:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:21:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:21:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 23:21:34,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:21:34,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136948464] [2023-02-14 23:21:34,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136948464] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:21:34,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481362629] [2023-02-14 23:21:34,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 23:21:34,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:21:34,885 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:21:34,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-14 23:21:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:21:34,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 23:21:34,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:21:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 23:21:34,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:21:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 23:21:35,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481362629] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:21:35,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:21:35,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-02-14 23:21:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344759907] [2023-02-14 23:21:35,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:21:35,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 23:21:35,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:21:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 23:21:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:21:35,004 INFO L87 Difference]: Start difference. First operand 586 states and 784 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2023-02-14 23:21:36,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:21:36,222 INFO L93 Difference]: Finished difference Result 988 states and 1283 transitions. [2023-02-14 23:21:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 23:21:36,222 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-14 23:21:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:21:36,224 INFO L225 Difference]: With dead ends: 988 [2023-02-14 23:21:36,224 INFO L226 Difference]: Without dead ends: 836 [2023-02-14 23:21:36,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:21:36,225 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:21:36,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 224 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:21:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2023-02-14 23:21:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 575. [2023-02-14 23:21:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3379790940766552) internal successors, (768), 574 states have internal predecessors, (768), 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) [2023-02-14 23:21:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 768 transitions. [2023-02-14 23:21:36,775 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 768 transitions. Word has length 36 [2023-02-14 23:21:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:21:36,775 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 768 transitions. [2023-02-14 23:21:36,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2023-02-14 23:21:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 768 transitions. [2023-02-14 23:21:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 23:21:36,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:21:36,777 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:21:36,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-14 23:21:36,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:36,982 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:21:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:21:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash -922807928, now seen corresponding path program 8 times [2023-02-14 23:21:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:21:36,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789102695] [2023-02-14 23:21:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:21:36,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:21:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:21:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 23:21:37,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:21:37,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789102695] [2023-02-14 23:21:37,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789102695] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:21:37,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231886560] [2023-02-14 23:21:37,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:21:37,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:37,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:21:37,232 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:21:37,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-14 23:21:37,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:21:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:21:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 23:21:37,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:21:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 23:21:37,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:21:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 23:21:37,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231886560] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:21:37,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:21:37,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2023-02-14 23:21:37,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206251823] [2023-02-14 23:21:37,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:21:37,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 23:21:37,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:21:37,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 23:21:37,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-14 23:21:37,428 INFO L87 Difference]: Start difference. First operand 575 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2023-02-14 23:21:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:21:40,187 INFO L93 Difference]: Finished difference Result 1389 states and 1766 transitions. [2023-02-14 23:21:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 23:21:40,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-14 23:21:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:21:40,190 INFO L225 Difference]: With dead ends: 1389 [2023-02-14 23:21:40,190 INFO L226 Difference]: Without dead ends: 1308 [2023-02-14 23:21:40,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-02-14 23:21:40,191 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 225 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:21:40,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 274 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:21:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-02-14 23:21:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 681. [2023-02-14 23:21:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3205882352941176) internal successors, (898), 680 states have internal predecessors, (898), 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) [2023-02-14 23:21:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 898 transitions. [2023-02-14 23:21:40,706 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 898 transitions. Word has length 36 [2023-02-14 23:21:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:21:40,706 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 898 transitions. [2023-02-14 23:21:40,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2023-02-14 23:21:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 898 transitions. [2023-02-14 23:21:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 23:21:40,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:21:40,708 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:21:40,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-14 23:21:40,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:40,913 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:21:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:21:40,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1662320984, now seen corresponding path program 10 times [2023-02-14 23:21:40,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:21:40,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941715450] [2023-02-14 23:21:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:21:40,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:21:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:21:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 23:21:41,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:21:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941715450] [2023-02-14 23:21:41,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941715450] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:21:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214753604] [2023-02-14 23:21:41,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:21:41,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:21:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:21:41,205 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:21:41,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-14 23:21:41,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:21:41,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:21:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 23:21:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:21:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 23:21:41,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:21:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 23:21:41,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214753604] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:21:41,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:21:41,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-02-14 23:21:41,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545044970] [2023-02-14 23:21:41,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:21:41,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 23:21:41,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:21:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 23:21:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2023-02-14 23:21:41,498 INFO L87 Difference]: Start difference. First operand 681 states and 898 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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) [2023-02-14 23:22:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:22:12,458 INFO L93 Difference]: Finished difference Result 2059 states and 2502 transitions. [2023-02-14 23:22:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2023-02-14 23:22:12,459 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-14 23:22:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:22:12,463 INFO L225 Difference]: With dead ends: 2059 [2023-02-14 23:22:12,463 INFO L226 Difference]: Without dead ends: 1926 [2023-02-14 23:22:12,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41456 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=5597, Invalid=92059, Unknown=0, NotChecked=0, Total=97656 [2023-02-14 23:22:12,466 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 721 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:22:12,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 688 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-02-14 23:22:12,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2023-02-14 23:22:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 659. [2023-02-14 23:22:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.3161094224924013) internal successors, (866), 658 states have internal predecessors, (866), 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) [2023-02-14 23:22:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 866 transitions. [2023-02-14 23:22:12,988 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 866 transitions. Word has length 36 [2023-02-14 23:22:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:22:12,988 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 866 transitions. [2023-02-14 23:22:12,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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) [2023-02-14 23:22:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 866 transitions. [2023-02-14 23:22:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 23:22:12,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:22:12,989 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:22:12,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-14 23:22:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-14 23:22:13,193 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:22:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:22:13,193 INFO L85 PathProgramCache]: Analyzing trace with hash -298016775, now seen corresponding path program 9 times [2023-02-14 23:22:13,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:22:13,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134176951] [2023-02-14 23:22:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:22:13,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:22:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:22:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 23:22:13,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:22:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134176951] [2023-02-14 23:22:13,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134176951] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:22:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882860481] [2023-02-14 23:22:13,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:22:13,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:22:13,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:22:13,461 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:22:13,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-14 23:22:13,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:22:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:22:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 23:22:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:22:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-14 23:22:13,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:22:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-14 23:22:13,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882860481] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:22:13,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:22:13,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 10] total 31 [2023-02-14 23:22:13,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615576153] [2023-02-14 23:22:13,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:22:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 23:22:13,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:22:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 23:22:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-02-14 23:22:13,803 INFO L87 Difference]: Start difference. First operand 659 states and 866 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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) [2023-02-14 23:22:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:22:17,510 INFO L93 Difference]: Finished difference Result 1274 states and 1842 transitions. [2023-02-14 23:22:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-14 23:22:17,511 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-14 23:22:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:22:17,513 INFO L225 Difference]: With dead ends: 1274 [2023-02-14 23:22:17,513 INFO L226 Difference]: Without dead ends: 1094 [2023-02-14 23:22:17,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1182, Invalid=10590, Unknown=0, NotChecked=0, Total=11772 [2023-02-14 23:22:17,514 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 375 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2825 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 3199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:22:17,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1008 Invalid, 3199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2825 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-14 23:22:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2023-02-14 23:22:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 749. [2023-02-14 23:22:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.3181818181818181) internal successors, (986), 748 states have internal predecessors, (986), 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) [2023-02-14 23:22:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 986 transitions. [2023-02-14 23:22:18,081 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 986 transitions. Word has length 36 [2023-02-14 23:22:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:22:18,081 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 986 transitions. [2023-02-14 23:22:18,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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) [2023-02-14 23:22:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 986 transitions. [2023-02-14 23:22:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 23:22:18,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:22:18,083 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:22:18,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-14 23:22:18,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-14 23:22:18,288 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:22:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:22:18,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1963294526, now seen corresponding path program 11 times [2023-02-14 23:22:18,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:22:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579480368] [2023-02-14 23:22:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:22:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:22:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:22:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:22:18,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:22:18,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579480368] [2023-02-14 23:22:18,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579480368] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:22:18,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306830188] [2023-02-14 23:22:18,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:22:18,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:22:18,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:22:18,663 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:22:18,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-14 23:22:19,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 23:22:19,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:22:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 23:22:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:22:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:22:19,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:22:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 23:22:20,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306830188] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:22:20,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:22:20,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 19] total 48 [2023-02-14 23:22:20,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484330894] [2023-02-14 23:22:20,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:22:20,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-14 23:22:20,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:22:20,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-14 23:22:20,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1805, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 23:22:20,206 INFO L87 Difference]: Start difference. First operand 749 states and 986 transitions. Second operand has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 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) [2023-02-14 23:22:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:22:30,431 INFO L93 Difference]: Finished difference Result 1427 states and 2032 transitions. [2023-02-14 23:22:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-02-14 23:22:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-14 23:22:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:22:30,435 INFO L225 Difference]: With dead ends: 1427 [2023-02-14 23:22:30,435 INFO L226 Difference]: Without dead ends: 1326 [2023-02-14 23:22:30,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8347 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5634, Invalid=19172, Unknown=0, NotChecked=0, Total=24806 [2023-02-14 23:22:30,436 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 570 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 4198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-14 23:22:30,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 751 Invalid, 4198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 3711 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-14 23:22:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2023-02-14 23:22:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 813. [2023-02-14 23:22:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.3201970443349753) internal successors, (1072), 812 states have internal predecessors, (1072), 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) [2023-02-14 23:22:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1072 transitions. [2023-02-14 23:22:31,148 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1072 transitions. Word has length 37 [2023-02-14 23:22:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:22:31,148 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1072 transitions. [2023-02-14 23:22:31,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 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) [2023-02-14 23:22:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1072 transitions. [2023-02-14 23:22:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 23:22:31,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:22:31,153 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:22:31,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-02-14 23:22:31,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:22:31,358 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:22:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:22:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1382972419, now seen corresponding path program 7 times [2023-02-14 23:22:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:22:31,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395768457] [2023-02-14 23:22:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:22:31,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:22:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:22:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-14 23:22:31,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:22:31,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395768457] [2023-02-14 23:22:31,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395768457] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:22:31,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516755461] [2023-02-14 23:22:31,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 23:22:31,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:22:31,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:22:31,665 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:22:31,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-14 23:22:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:22:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 23:22:31,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:22:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-14 23:22:31,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:22:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-14 23:22:31,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516755461] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:22:31,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:22:31,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2023-02-14 23:22:31,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675504353] [2023-02-14 23:22:31,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:22:31,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 23:22:31,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:22:31,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 23:22:31,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2023-02-14 23:22:31,944 INFO L87 Difference]: Start difference. First operand 813 states and 1072 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2023-02-14 23:23:08,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:23:08,253 INFO L93 Difference]: Finished difference Result 2531 states and 3027 transitions. [2023-02-14 23:23:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 375 states. [2023-02-14 23:23:08,254 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-14 23:23:08,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:23:08,259 INFO L225 Difference]: With dead ends: 2531 [2023-02-14 23:23:08,259 INFO L226 Difference]: Without dead ends: 2414 [2023-02-14 23:23:08,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63538 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=6773, Invalid=139533, Unknown=0, NotChecked=0, Total=146306 [2023-02-14 23:23:08,265 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 892 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3536 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 4191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 3536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:23:08,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 891 Invalid, 4191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 3536 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-02-14 23:23:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2023-02-14 23:23:09,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 765. [2023-02-14 23:23:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 1.3193717277486912) internal successors, (1008), 764 states have internal predecessors, (1008), 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) [2023-02-14 23:23:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1008 transitions. [2023-02-14 23:23:09,092 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1008 transitions. Word has length 39 [2023-02-14 23:23:09,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:23:09,093 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 1008 transitions. [2023-02-14 23:23:09,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2023-02-14 23:23:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1008 transitions. [2023-02-14 23:23:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 23:23:09,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:23:09,094 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:23:09,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-14 23:23:09,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-14 23:23:09,294 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:23:09,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:23:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash 843702860, now seen corresponding path program 12 times [2023-02-14 23:23:09,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:23:09,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64813828] [2023-02-14 23:23:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:23:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:23:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:23:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-14 23:23:09,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:23:09,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64813828] [2023-02-14 23:23:09,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64813828] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:23:09,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948318467] [2023-02-14 23:23:09,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 23:23:09,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:23:09,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:23:09,621 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:23:09,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-14 23:23:09,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-14 23:23:09,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:23:09,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 23:23:09,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:23:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-14 23:23:09,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:23:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-14 23:23:10,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948318467] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:23:10,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:23:10,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2023-02-14 23:23:10,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849115243] [2023-02-14 23:23:10,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:23:10,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 23:23:10,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:23:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 23:23:10,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2023-02-14 23:23:10,035 INFO L87 Difference]: Start difference. First operand 765 states and 1008 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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) [2023-02-14 23:24:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:24:18,877 INFO L93 Difference]: Finished difference Result 2769 states and 3339 transitions. [2023-02-14 23:24:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 414 states. [2023-02-14 23:24:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-14 23:24:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:24:18,883 INFO L225 Difference]: With dead ends: 2769 [2023-02-14 23:24:18,883 INFO L226 Difference]: Without dead ends: 2657 [2023-02-14 23:24:18,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78664 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=9243, Invalid=169263, Unknown=0, NotChecked=0, Total=178506 [2023-02-14 23:24:18,889 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1111 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 3102 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 3955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 3102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:24:18,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 827 Invalid, 3955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 3102 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-02-14 23:24:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2023-02-14 23:24:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 804. [2023-02-14 23:24:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 1.3175591531755915) internal successors, (1058), 803 states have internal predecessors, (1058), 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) [2023-02-14 23:24:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1058 transitions. [2023-02-14 23:24:19,751 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1058 transitions. Word has length 39 [2023-02-14 23:24:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:24:19,751 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 1058 transitions. [2023-02-14 23:24:19,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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) [2023-02-14 23:24:19,752 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1058 transitions. [2023-02-14 23:24:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 23:24:19,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:24:19,753 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:24:19,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-14 23:24:19,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-14 23:24:19,953 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:24:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:24:19,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1969715723, now seen corresponding path program 10 times [2023-02-14 23:24:19,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:24:19,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213118964] [2023-02-14 23:24:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:24:19,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:24:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:24:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 23:24:20,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:24:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213118964] [2023-02-14 23:24:20,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213118964] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:24:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795539173] [2023-02-14 23:24:20,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:24:20,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:24:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:24:20,292 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:24:20,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-14 23:24:20,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:24:20,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:24:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 23:24:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:24:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 23:24:20,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:24:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-14 23:24:20,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795539173] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:24:20,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:24:20,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 6] total 25 [2023-02-14 23:24:20,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682993185] [2023-02-14 23:24:20,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:24:20,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 23:24:20,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:24:20,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 23:24:20,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-02-14 23:24:20,516 INFO L87 Difference]: Start difference. First operand 804 states and 1058 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 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)