./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-simple/deep-nested.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 abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 16:13:03,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 16:13:03,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 16:13:03,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 16:13:03,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 16:13:03,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 16:13:03,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 16:13:03,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 16:13:03,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 16:13:03,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 16:13:03,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 16:13:03,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 16:13:03,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 16:13:03,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 16:13:03,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 16:13:03,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 16:13:03,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 16:13:03,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 16:13:03,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 16:13:03,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 16:13:03,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 16:13:03,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 16:13:03,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 16:13:03,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 16:13:03,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 16:13:03,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 16:13:03,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 16:13:03,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 16:13:03,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 16:13:03,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 16:13:03,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 16:13:03,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 16:13:03,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 16:13:03,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 16:13:03,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 16:13:03,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 16:13:03,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 16:13:03,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 16:13:03,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 16:13:03,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 16:13:03,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 16:13:03,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 16:13:03,389 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 16:13:03,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 16:13:03,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 16:13:03,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 16:13:03,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 16:13:03,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 16:13:03,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 16:13:03,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 16:13:03,391 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 16:13:03,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 16:13:03,391 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 16:13:03,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 16:13:03,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 16:13:03,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 16:13:03,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 16:13:03,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 16:13:03,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 16:13:03,392 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 16:13:03,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 16:13:03,392 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 16:13:03,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 16:13:03,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 16:13:03,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 16:13:03,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 16:13:03,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:13:03,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 16:13:03,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 16:13:03,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 16:13:03,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 16:13:03,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 16:13:03,393 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 16:13:03,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 16:13:03,393 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 16:13:03,393 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 16:13:03,393 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 16:13:03,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2023-02-18 16:13:03,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 16:13:03,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 16:13:03,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 16:13:03,549 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 16:13:03,549 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 16:13:03,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/deep-nested.c [2023-02-18 16:13:04,514 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 16:13:04,641 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 16:13:04,642 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c [2023-02-18 16:13:04,645 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e02e426c/e6122874850c47dd80aec49d104c4494/FLAG024b54af4 [2023-02-18 16:13:05,078 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e02e426c/e6122874850c47dd80aec49d104c4494 [2023-02-18 16:13:05,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 16:13:05,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 16:13:05,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 16:13:05,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 16:13:05,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 16:13:05,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7958ed97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05, skipping insertion in model container [2023-02-18 16:13:05,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 16:13:05,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 16:13:05,187 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/loop-simple/deep-nested.c[625,638] [2023-02-18 16:13:05,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:13:05,200 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 16:13:05,219 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/loop-simple/deep-nested.c[625,638] [2023-02-18 16:13:05,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:13:05,232 INFO L208 MainTranslator]: Completed translation [2023-02-18 16:13:05,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05 WrapperNode [2023-02-18 16:13:05,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 16:13:05,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 16:13:05,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 16:13:05,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 16:13:05,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,256 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2023-02-18 16:13:05,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 16:13:05,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 16:13:05,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 16:13:05,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 16:13:05,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,284 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 16:13:05,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 16:13:05,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 16:13:05,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 16:13:05,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (1/1) ... [2023-02-18 16:13:05,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:13:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:05,343 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) [2023-02-18 16:13:05,346 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 [2023-02-18 16:13:05,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 16:13:05,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 16:13:05,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 16:13:05,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 16:13:05,424 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 16:13:05,427 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 16:13:05,570 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 16:13:05,587 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 16:13:05,588 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-18 16:13:05,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:13:05 BoogieIcfgContainer [2023-02-18 16:13:05,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 16:13:05,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 16:13:05,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 16:13:05,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 16:13:05,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 04:13:05" (1/3) ... [2023-02-18 16:13:05,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd2805f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:13:05, skipping insertion in model container [2023-02-18 16:13:05,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:13:05" (2/3) ... [2023-02-18 16:13:05,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd2805f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:13:05, skipping insertion in model container [2023-02-18 16:13:05,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:13:05" (3/3) ... [2023-02-18 16:13:05,594 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2023-02-18 16:13:05,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 16:13:05,605 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 16:13:05,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 16:13:05,645 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;@2be5bec7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 16:13:05,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 16:13:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 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) [2023-02-18 16:13:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 16:13:05,654 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:05,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:05,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash -180366952, now seen corresponding path program 1 times [2023-02-18 16:13:05,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:05,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624719889] [2023-02-18 16:13:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:05,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:13:05,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:05,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624719889] [2023-02-18 16:13:05,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624719889] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:13:05,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:13:05,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 16:13:05,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50752343] [2023-02-18 16:13:05,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:13:05,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 16:13:05,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 16:13:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 16:13:05,924 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 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 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-02-18 16:13:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:06,016 INFO L93 Difference]: Finished difference Result 39 states and 62 transitions. [2023-02-18 16:13:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 16:13:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-02-18 16:13:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:06,022 INFO L225 Difference]: With dead ends: 39 [2023-02-18 16:13:06,024 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 16:13:06,038 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 [2023-02-18 16:13:06,040 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:06,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 20 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:13:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 16:13:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-02-18 16:13:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-02-18 16:13:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-02-18 16:13:06,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2023-02-18 16:13:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:06,063 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-02-18 16:13:06,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-02-18 16:13:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-02-18 16:13:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 16:13:06,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:06,064 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:06,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 16:13:06,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:06,065 INFO L85 PathProgramCache]: Analyzing trace with hash -303894894, now seen corresponding path program 1 times [2023-02-18 16:13:06,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:06,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536355886] [2023-02-18 16:13:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:06,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:13:06,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:06,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536355886] [2023-02-18 16:13:06,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536355886] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:06,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47952105] [2023-02-18 16:13:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:06,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:06,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:06,328 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) [2023-02-18 16:13:06,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 16:13:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:06,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 16:13:06,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:13:06,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:13:06,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47952105] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:06,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:06,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-02-18 16:13:06,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217640578] [2023-02-18 16:13:06,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:06,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 16:13:06,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:06,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 16:13:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-18 16:13:06,658 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2023-02-18 16:13:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:06,964 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2023-02-18 16:13:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 16:13:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 12 [2023-02-18 16:13:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:06,966 INFO L225 Difference]: With dead ends: 80 [2023-02-18 16:13:06,966 INFO L226 Difference]: Without dead ends: 78 [2023-02-18 16:13:06,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:13:06,967 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 113 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:06,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 19 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:13:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-18 16:13:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2023-02-18 16:13:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 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) [2023-02-18 16:13:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-02-18 16:13:06,978 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 12 [2023-02-18 16:13:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:06,979 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-02-18 16:13:06,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2023-02-18 16:13:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-02-18 16:13:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 16:13:06,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:06,989 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:06,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:07,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:07,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash -300219110, now seen corresponding path program 1 times [2023-02-18 16:13:07,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621463955] [2023-02-18 16:13:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:07,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-18 16:13:07,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:07,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621463955] [2023-02-18 16:13:07,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621463955] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:07,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6863819] [2023-02-18 16:13:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:07,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:07,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:07,306 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) [2023-02-18 16:13:07,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 16:13:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:07,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 16:13:07,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 16:13:07,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:13:07,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6863819] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:13:07,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:13:07,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-02-18 16:13:07,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410151192] [2023-02-18 16:13:07,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:13:07,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 16:13:07,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 16:13:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 16:13:07,365 INFO L87 Difference]: Start difference. First operand 36 states and 47 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) [2023-02-18 16:13:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:07,409 INFO L93 Difference]: Finished difference Result 91 states and 120 transitions. [2023-02-18 16:13:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 16:13:07,409 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 24 [2023-02-18 16:13:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:07,410 INFO L225 Difference]: With dead ends: 91 [2023-02-18 16:13:07,410 INFO L226 Difference]: Without dead ends: 68 [2023-02-18 16:13:07,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:13:07,411 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:07,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 18 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-18 16:13:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2023-02-18 16:13:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 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) [2023-02-18 16:13:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-02-18 16:13:07,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 24 [2023-02-18 16:13:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:07,434 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-02-18 16:13:07,434 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) [2023-02-18 16:13:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-02-18 16:13:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 16:13:07,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:07,435 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:07,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:07,640 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,SelfDestructingSolverStorable2 [2023-02-18 16:13:07,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2053128687, now seen corresponding path program 1 times [2023-02-18 16:13:07,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:07,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699455659] [2023-02-18 16:13:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:07,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 16:13:07,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:07,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699455659] [2023-02-18 16:13:07,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699455659] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:07,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26572709] [2023-02-18 16:13:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:07,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:07,774 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) [2023-02-18 16:13:07,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 16:13:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 16:13:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 16:13:07,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:13:07,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26572709] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:13:07,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:13:07,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-02-18 16:13:07,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962571780] [2023-02-18 16:13:07,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:13:07,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:13:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:13:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:13:07,880 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2023-02-18 16:13:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:07,935 INFO L93 Difference]: Finished difference Result 100 states and 131 transitions. [2023-02-18 16:13:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 16:13:07,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 [2023-02-18 16:13:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:07,936 INFO L225 Difference]: With dead ends: 100 [2023-02-18 16:13:07,936 INFO L226 Difference]: Without dead ends: 66 [2023-02-18 16:13:07,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-18 16:13:07,937 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:07,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-18 16:13:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 40. [2023-02-18 16:13:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 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) [2023-02-18 16:13:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-02-18 16:13:07,947 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 27 [2023-02-18 16:13:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:07,947 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-02-18 16:13:07,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2023-02-18 16:13:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-02-18 16:13:07,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 16:13:07,948 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:07,948 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:07,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 16:13:08,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:08,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1169919440, now seen corresponding path program 1 times [2023-02-18 16:13:08,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:08,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783286257] [2023-02-18 16:13:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:08,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 16:13:08,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783286257] [2023-02-18 16:13:08,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783286257] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212965131] [2023-02-18 16:13:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:08,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:08,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:08,262 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) [2023-02-18 16:13:08,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 16:13:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 16:13:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:08,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:13:08,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212965131] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:13:08,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:13:08,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-02-18 16:13:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383624067] [2023-02-18 16:13:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:13:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:13:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:13:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:13:08,334 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2023-02-18 16:13:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:08,385 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2023-02-18 16:13:08,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 16:13:08,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 30 [2023-02-18 16:13:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:08,387 INFO L225 Difference]: With dead ends: 84 [2023-02-18 16:13:08,387 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 16:13:08,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-18 16:13:08,388 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:08,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 16:13:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2023-02-18 16:13:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 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) [2023-02-18 16:13:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-02-18 16:13:08,406 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 30 [2023-02-18 16:13:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:08,406 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-02-18 16:13:08,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2023-02-18 16:13:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-02-18 16:13:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 16:13:08,408 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:08,408 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:08,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:08,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:08,613 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:08,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1349858359, now seen corresponding path program 2 times [2023-02-18 16:13:08,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:08,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512142308] [2023-02-18 16:13:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 16:13:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:08,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512142308] [2023-02-18 16:13:08,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512142308] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:08,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176588701] [2023-02-18 16:13:08,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:13:08,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:08,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:08,775 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) [2023-02-18 16:13:08,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 16:13:08,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-18 16:13:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:08,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 16:13:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:13:08,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:13:08,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176588701] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:13:08,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:13:08,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-02-18 16:13:08,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177477551] [2023-02-18 16:13:08,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:13:08,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 16:13:08,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:08,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 16:13:08,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:13:08,839 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-02-18 16:13:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:08,871 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2023-02-18 16:13:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 16:13:08,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 [2023-02-18 16:13:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:08,873 INFO L225 Difference]: With dead ends: 67 [2023-02-18 16:13:08,873 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 16:13:08,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:13:08,874 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:08,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 16:13:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2023-02-18 16:13:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 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) [2023-02-18 16:13:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2023-02-18 16:13:08,901 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 36 [2023-02-18 16:13:08,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:08,917 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2023-02-18 16:13:08,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-02-18 16:13:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2023-02-18 16:13:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 16:13:08,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:08,918 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:08,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:09,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:09,123 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1511458419, now seen corresponding path program 3 times [2023-02-18 16:13:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:09,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247689250] [2023-02-18 16:13:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 16:13:09,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:09,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247689250] [2023-02-18 16:13:09,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247689250] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:09,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810754965] [2023-02-18 16:13:09,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:13:09,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:09,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:09,253 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) [2023-02-18 16:13:09,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 16:13:09,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-02-18 16:13:09,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:09,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 16:13:09,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 16:13:09,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:13:09,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810754965] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:13:09,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:13:09,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-02-18 16:13:09,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388399519] [2023-02-18 16:13:09,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:13:09,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 16:13:09,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:09,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 16:13:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:13:09,309 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-02-18 16:13:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:09,345 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2023-02-18 16:13:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 16:13:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2023-02-18 16:13:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:09,346 INFO L225 Difference]: With dead ends: 87 [2023-02-18 16:13:09,346 INFO L226 Difference]: Without dead ends: 85 [2023-02-18 16:13:09,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:13:09,347 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:09,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:13:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-18 16:13:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2023-02-18 16:13:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.280701754385965) internal successors, (73), 57 states have internal predecessors, (73), 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) [2023-02-18 16:13:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2023-02-18 16:13:09,360 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 45 [2023-02-18 16:13:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:09,360 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2023-02-18 16:13:09,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-02-18 16:13:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2023-02-18 16:13:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 16:13:09,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:09,361 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:09,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:09,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:09,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:09,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1257114416, now seen corresponding path program 4 times [2023-02-18 16:13:09,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:09,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482589486] [2023-02-18 16:13:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:09,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-18 16:13:09,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:09,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482589486] [2023-02-18 16:13:09,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482589486] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:09,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887941254] [2023-02-18 16:13:09,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:13:09,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:09,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:09,721 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) [2023-02-18 16:13:09,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 16:13:09,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:13:09,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:09,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 16:13:09,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 16:13:09,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 98 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 16:13:09,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887941254] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:09,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:09,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-18 16:13:09,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072732904] [2023-02-18 16:13:09,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:09,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 16:13:09,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 16:13:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-18 16:13:09,912 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2023-02-18 16:13:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:10,332 INFO L93 Difference]: Finished difference Result 233 states and 305 transitions. [2023-02-18 16:13:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 16:13:10,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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 57 [2023-02-18 16:13:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:10,333 INFO L225 Difference]: With dead ends: 233 [2023-02-18 16:13:10,333 INFO L226 Difference]: Without dead ends: 125 [2023-02-18 16:13:10,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 16:13:10,334 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 172 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:10,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 56 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:13:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-18 16:13:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2023-02-18 16:13:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 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) [2023-02-18 16:13:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-02-18 16:13:10,357 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 57 [2023-02-18 16:13:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:10,357 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-02-18 16:13:10,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2023-02-18 16:13:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-02-18 16:13:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-18 16:13:10,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:10,358 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:10,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 16:13:10,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:10,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:10,565 INFO L85 PathProgramCache]: Analyzing trace with hash 722891500, now seen corresponding path program 5 times [2023-02-18 16:13:10,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:10,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662796968] [2023-02-18 16:13:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:10,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 16 proven. 141 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-02-18 16:13:10,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:10,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662796968] [2023-02-18 16:13:10,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662796968] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:10,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384316476] [2023-02-18 16:13:10,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:13:10,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:10,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:10,835 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) [2023-02-18 16:13:10,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 16:13:10,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:13:10,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 16:13:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 186 proven. 18 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-02-18 16:13:10,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 186 proven. 18 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-02-18 16:13:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384316476] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:11,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:11,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2023-02-18 16:13:11,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270668949] [2023-02-18 16:13:11,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:11,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 16:13:11,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:11,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 16:13:11,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-02-18 16:13:11,082 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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) [2023-02-18 16:13:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:11,712 INFO L93 Difference]: Finished difference Result 530 states and 658 transitions. [2023-02-18 16:13:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 16:13:11,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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 78 [2023-02-18 16:13:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:11,713 INFO L225 Difference]: With dead ends: 530 [2023-02-18 16:13:11,713 INFO L226 Difference]: Without dead ends: 330 [2023-02-18 16:13:11,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 16:13:11,715 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 164 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:11,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 93 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:13:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-18 16:13:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 160. [2023-02-18 16:13:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.119496855345912) internal successors, (178), 159 states have internal predecessors, (178), 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) [2023-02-18 16:13:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 178 transitions. [2023-02-18 16:13:11,741 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 178 transitions. Word has length 78 [2023-02-18 16:13:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:11,742 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 178 transitions. [2023-02-18 16:13:11,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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) [2023-02-18 16:13:11,742 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 178 transitions. [2023-02-18 16:13:11,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-18 16:13:11,743 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:11,743 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 9, 8, 8, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 16:13:11,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 16:13:11,948 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,SelfDestructingSolverStorable8 [2023-02-18 16:13:11,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1550504784, now seen corresponding path program 6 times [2023-02-18 16:13:11,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:11,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092581927] [2023-02-18 16:13:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:11,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 20 proven. 514 refuted. 0 times theorem prover too weak. 1872 trivial. 0 not checked. [2023-02-18 16:13:12,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:12,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092581927] [2023-02-18 16:13:12,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092581927] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:12,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037190214] [2023-02-18 16:13:12,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:13:12,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:12,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:12,478 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) [2023-02-18 16:13:12,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 16:13:12,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 16:13:12,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:12,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 16:13:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1545 trivial. 0 not checked. [2023-02-18 16:13:12,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1545 trivial. 0 not checked. [2023-02-18 16:13:12,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037190214] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:12,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:12,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 14 [2023-02-18 16:13:12,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18481202] [2023-02-18 16:13:12,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:12,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 16:13:12,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 16:13:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-02-18 16:13:12,686 INFO L87 Difference]: Start difference. First operand 160 states and 178 transitions. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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) [2023-02-18 16:13:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:13,502 INFO L93 Difference]: Finished difference Result 903 states and 1043 transitions. [2023-02-18 16:13:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:13:13,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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 159 [2023-02-18 16:13:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:13,504 INFO L225 Difference]: With dead ends: 903 [2023-02-18 16:13:13,504 INFO L226 Difference]: Without dead ends: 688 [2023-02-18 16:13:13,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=466, Invalid=1696, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 16:13:13,506 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 166 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:13,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 71 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:13:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-02-18 16:13:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 334. [2023-02-18 16:13:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.102102102102102) internal successors, (367), 333 states have internal predecessors, (367), 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) [2023-02-18 16:13:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 367 transitions. [2023-02-18 16:13:13,577 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 367 transitions. Word has length 159 [2023-02-18 16:13:13,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:13,577 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 367 transitions. [2023-02-18 16:13:13,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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) [2023-02-18 16:13:13,577 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 367 transitions. [2023-02-18 16:13:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-02-18 16:13:13,581 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:13,581 INFO L195 NwaCegarLoop]: trace histogram [80, 79, 79, 15, 14, 14, 7, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-02-18 16:13:13,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-18 16:13:13,785 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,SelfDestructingSolverStorable9 [2023-02-18 16:13:13,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:13,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:13,786 INFO L85 PathProgramCache]: Analyzing trace with hash 78870797, now seen corresponding path program 7 times [2023-02-18 16:13:13,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:13,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573176966] [2023-02-18 16:13:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11065 backedges. 44 proven. 1615 refuted. 0 times theorem prover too weak. 9406 trivial. 0 not checked. [2023-02-18 16:13:14,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:14,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573176966] [2023-02-18 16:13:14,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573176966] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:14,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76917446] [2023-02-18 16:13:14,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:13:14,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:14,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:14,917 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) [2023-02-18 16:13:14,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 16:13:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:15,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 16:13:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11065 backedges. 2842 proven. 158 refuted. 0 times theorem prover too weak. 8065 trivial. 0 not checked. [2023-02-18 16:13:15,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11065 backedges. 2842 proven. 158 refuted. 0 times theorem prover too weak. 8065 trivial. 0 not checked. [2023-02-18 16:13:15,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76917446] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:15,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:15,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2023-02-18 16:13:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415487676] [2023-02-18 16:13:15,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:15,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 16:13:15,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:15,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 16:13:15,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-02-18 16:13:15,339 INFO L87 Difference]: Start difference. First operand 334 states and 367 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 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) [2023-02-18 16:13:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:18,749 INFO L93 Difference]: Finished difference Result 1727 states and 2034 transitions. [2023-02-18 16:13:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-02-18 16:13:18,749 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 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 333 [2023-02-18 16:13:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:18,753 INFO L225 Difference]: With dead ends: 1727 [2023-02-18 16:13:18,753 INFO L226 Difference]: Without dead ends: 1397 [2023-02-18 16:13:18,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 651 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1425, Invalid=7505, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 16:13:18,756 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 394 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:18,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 76 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 16:13:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2023-02-18 16:13:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1251. [2023-02-18 16:13:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 1.0488) internal successors, (1311), 1250 states have internal predecessors, (1311), 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) [2023-02-18 16:13:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1311 transitions. [2023-02-18 16:13:18,966 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1311 transitions. Word has length 333 [2023-02-18 16:13:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:18,966 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1311 transitions. [2023-02-18 16:13:18,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 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) [2023-02-18 16:13:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1311 transitions. [2023-02-18 16:13:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1249 [2023-02-18 16:13:18,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:18,988 INFO L195 NwaCegarLoop]: trace histogram [358, 357, 357, 42, 41, 41, 7, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-02-18 16:13:18,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 16:13:19,195 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,SelfDestructingSolverStorable10 [2023-02-18 16:13:19,195 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2083908146, now seen corresponding path program 8 times [2023-02-18 16:13:19,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:19,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209269421] [2023-02-18 16:13:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:19,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 208950 backedges. 71 proven. 10628 refuted. 0 times theorem prover too weak. 198251 trivial. 0 not checked. [2023-02-18 16:13:24,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209269421] [2023-02-18 16:13:24,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209269421] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578566796] [2023-02-18 16:13:24,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:13:24,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:24,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:24,287 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) [2023-02-18 16:13:24,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 16:13:24,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:13:24,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 16:13:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 208950 backedges. 37450 proven. 861 refuted. 0 times theorem prover too weak. 170639 trivial. 0 not checked. [2023-02-18 16:13:25,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 208950 backedges. 36932 proven. 1379 refuted. 0 times theorem prover too weak. 170639 trivial. 0 not checked. [2023-02-18 16:13:25,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578566796] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:25,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:25,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 21] total 52 [2023-02-18 16:13:25,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115513000] [2023-02-18 16:13:25,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:25,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-18 16:13:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-18 16:13:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=2332, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 16:13:25,671 INFO L87 Difference]: Start difference. First operand 1251 states and 1311 transitions. Second operand has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 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) [2023-02-18 16:13:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:13:38,404 INFO L93 Difference]: Finished difference Result 3948 states and 4562 transitions. [2023-02-18 16:13:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 16:13:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 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 1248 [2023-02-18 16:13:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:13:38,410 INFO L225 Difference]: With dead ends: 3948 [2023-02-18 16:13:38,410 INFO L226 Difference]: Without dead ends: 2701 [2023-02-18 16:13:38,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2535 GetRequests, 2459 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=854, Invalid=4846, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 16:13:38,413 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 222 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:13:38,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 105 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-02-18 16:13:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2023-02-18 16:13:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2699. [2023-02-18 16:13:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 1.0226093402520386) internal successors, (2759), 2698 states have internal predecessors, (2759), 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) [2023-02-18 16:13:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 2759 transitions. [2023-02-18 16:13:38,884 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 2759 transitions. Word has length 1248 [2023-02-18 16:13:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:13:38,886 INFO L495 AbstractCegarLoop]: Abstraction has 2699 states and 2759 transitions. [2023-02-18 16:13:38,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 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) [2023-02-18 16:13:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 2759 transitions. [2023-02-18 16:13:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2695 [2023-02-18 16:13:38,966 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:13:38,966 INFO L195 NwaCegarLoop]: trace histogram [840, 839, 839, 42, 41, 41, 7, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-02-18 16:13:38,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-18 16:13:39,172 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,SelfDestructingSolverStorable11 [2023-02-18 16:13:39,173 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:13:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:13:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1889813078, now seen corresponding path program 9 times [2023-02-18 16:13:39,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:13:39,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075475030] [2023-02-18 16:13:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:13:39,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:13:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:13:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1093661 backedges. 71 proven. 52249 refuted. 0 times theorem prover too weak. 1041341 trivial. 0 not checked. [2023-02-18 16:13:55,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:13:55,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075475030] [2023-02-18 16:13:55,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075475030] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:13:55,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318737450] [2023-02-18 16:13:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:13:55,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:13:55,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:13:55,057 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) [2023-02-18 16:13:55,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 16:13:55,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 16:13:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:13:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 16:13:55,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:13:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1093661 backedges. 446340 proven. 44503 refuted. 0 times theorem prover too weak. 602818 trivial. 0 not checked. [2023-02-18 16:13:55,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:13:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1093661 backedges. 0 proven. 490843 refuted. 0 times theorem prover too weak. 602818 trivial. 0 not checked. [2023-02-18 16:13:56,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318737450] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:13:56,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:13:56,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2023-02-18 16:13:56,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357530160] [2023-02-18 16:13:56,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:13:56,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 16:13:56,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:13:56,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 16:13:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2023-02-18 16:13:56,294 INFO L87 Difference]: Start difference. First operand 2699 states and 2759 transitions. Second operand has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 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) [2023-02-18 16:14:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:14:02,659 INFO L93 Difference]: Finished difference Result 15593 states and 16267 transitions. [2023-02-18 16:14:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-02-18 16:14:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 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 2694 [2023-02-18 16:14:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:14:02,691 INFO L225 Difference]: With dead ends: 15593 [2023-02-18 16:14:02,691 INFO L226 Difference]: Without dead ends: 12898 [2023-02-18 16:14:02,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5526 GetRequests, 5382 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6602 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2220, Invalid=18660, Unknown=0, NotChecked=0, Total=20880 [2023-02-18 16:14:02,699 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3045 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 3045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:14:02,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 89 Invalid, 3171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 3045 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 16:14:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12898 states. [2023-02-18 16:14:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12898 to 6288. [2023-02-18 16:14:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6288 states, 6287 states have (on average 1.0189279465563863) internal successors, (6406), 6287 states have internal predecessors, (6406), 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) [2023-02-18 16:14:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6288 states to 6288 states and 6406 transitions. [2023-02-18 16:14:04,068 INFO L78 Accepts]: Start accepts. Automaton has 6288 states and 6406 transitions. Word has length 2694 [2023-02-18 16:14:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:14:04,069 INFO L495 AbstractCegarLoop]: Abstraction has 6288 states and 6406 transitions. [2023-02-18 16:14:04,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 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) [2023-02-18 16:14:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6288 states and 6406 transitions. [2023-02-18 16:14:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6286 [2023-02-18 16:14:04,319 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:14:04,321 INFO L195 NwaCegarLoop]: trace histogram [1981, 1980, 1980, 90, 89, 89, 15, 14, 14, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-02-18 16:14:04,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-18 16:14:04,525 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,SelfDestructingSolverStorable12 [2023-02-18 16:14:04,525 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:14:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:14:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1959547704, now seen corresponding path program 10 times [2023-02-18 16:14:04,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:14:04,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051979457] [2023-02-18 16:14:04,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:14:04,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:14:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:15:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6071439 backedges. 135 proven. 135928 refuted. 0 times theorem prover too weak. 5935376 trivial. 0 not checked. [2023-02-18 16:15:13,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:15:13,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051979457] [2023-02-18 16:15:13,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051979457] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:15:13,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029171698] [2023-02-18 16:15:13,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:15:13,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:15:13,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:15:13,682 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) [2023-02-18 16:15:13,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 16:15:15,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:15:15,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:15:15,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 8645 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 16:15:15,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:15:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6071439 backedges. 2913718 proven. 50471 refuted. 0 times theorem prover too weak. 3107250 trivial. 0 not checked. [2023-02-18 16:15:16,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:15:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6071439 backedges. 2376505 proven. 587684 refuted. 0 times theorem prover too weak. 3107250 trivial. 0 not checked. [2023-02-18 16:15:17,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029171698] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:15:17,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:15:17,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17, 17] total 57 [2023-02-18 16:15:17,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156641012] [2023-02-18 16:15:17,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:15:17,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 16:15:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:15:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 16:15:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2838, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 16:15:18,000 INFO L87 Difference]: Start difference. First operand 6288 states and 6406 transitions. Second operand has 57 states, 57 states have (on average 4.140350877192983) internal successors, (236), 57 states have internal predecessors, (236), 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) [2023-02-18 16:19:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:05,324 INFO L93 Difference]: Finished difference Result 26386 states and 28760 transitions. [2023-02-18 16:19:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 444 states. [2023-02-18 16:19:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.140350877192983) internal successors, (236), 57 states have internal predecessors, (236), 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 6285 [2023-02-18 16:19:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:05,378 INFO L225 Difference]: With dead ends: 26386 [2023-02-18 16:19:05,378 INFO L226 Difference]: Without dead ends: 20102 [2023-02-18 16:19:05,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13043 GetRequests, 12544 SyntacticMatches, 2 SemanticMatches, 497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101600 ImplicationChecksByTransitivity, 209.0s TimeCoverageRelationStatistics Valid=27510, Invalid=220992, Unknown=0, NotChecked=0, Total=248502 [2023-02-18 16:19:05,404 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2464 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 15828 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2464 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 16420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 15828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:05,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2464 Valid, 93 Invalid, 16420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 15828 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2023-02-18 16:19:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20102 states. [2023-02-18 16:19:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20102 to 18977. [2023-02-18 16:19:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18977 states, 18976 states have (on average 1.0125948566610454) internal successors, (19215), 18976 states have internal predecessors, (19215), 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) [2023-02-18 16:19:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18977 states to 18977 states and 19215 transitions. [2023-02-18 16:19:09,145 INFO L78 Accepts]: Start accepts. Automaton has 18977 states and 19215 transitions. Word has length 6285 [2023-02-18 16:19:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:19:09,146 INFO L495 AbstractCegarLoop]: Abstraction has 18977 states and 19215 transitions. [2023-02-18 16:19:09,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.140350877192983) internal successors, (236), 57 states have internal predecessors, (236), 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) [2023-02-18 16:19:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 18977 states and 19215 transitions. [2023-02-18 16:19:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18973 [2023-02-18 16:19:10,826 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:19:10,830 INFO L195 NwaCegarLoop]: trace histogram [6090, 6089, 6089, 210, 209, 209, 15, 14, 14, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-02-18 16:19:10,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 16:19:11,033 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,SelfDestructingSolverStorable13 [2023-02-18 16:19:11,033 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:11,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1536340176, now seen corresponding path program 11 times [2023-02-18 16:19:11,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:11,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836128415] [2023-02-18 16:19:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat