./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.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 368647bf8c8fe53592ceb4314bbebffd0b8c087a8115d4714b27d4e56ab0a9cf --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:52:11,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:52:11,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:52:11,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:52:11,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:52:11,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:52:11,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:52:11,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:52:11,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:52:11,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:52:11,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:52:11,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:52:11,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:52:11,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:52:11,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:52:11,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:52:11,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:52:11,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:52:11,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:52:11,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:52:11,374 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:52:11,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:52:11,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:52:11,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:52:11,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:52:11,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:52:11,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:52:11,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:52:11,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:52:11,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:52:11,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:52:11,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:52:11,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:52:11,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:52:11,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:52:11,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:52:11,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:52:11,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:52:11,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:52:11,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:52:11,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:52:11,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:52:11,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:52:11,434 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:52:11,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:52:11,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:52:11,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:52:11,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:52:11,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:52:11,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:52:11,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:52:11,437 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:52:11,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:52:11,438 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:52:11,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:52:11,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:52:11,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:52:11,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:52:11,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:52:11,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:52:11,440 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:52:11,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:52:11,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:52:11,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:52:11,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:52:11,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:52:11,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:52:11,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:52:11,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:52:11,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:52:11,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:52:11,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:52:11,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:52:11,444 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:52:11,444 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:52:11,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:52:11,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 368647bf8c8fe53592ceb4314bbebffd0b8c087a8115d4714b27d4e56ab0a9cf [2022-07-19 17:52:11,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:52:11,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:52:11,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:52:11,677 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:52:11,677 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:52:11,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c [2022-07-19 17:52:11,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69f567b1/fff21174a82345d3b0a5fd7324134264/FLAG748a8f8c8 [2022-07-19 17:52:12,208 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:52:12,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c [2022-07-19 17:52:12,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69f567b1/fff21174a82345d3b0a5fd7324134264/FLAG748a8f8c8 [2022-07-19 17:52:12,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69f567b1/fff21174a82345d3b0a5fd7324134264 [2022-07-19 17:52:12,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:52:12,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:52:12,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:52:12,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:52:12,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:52:12,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dac46b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12, skipping insertion in model container [2022-07-19 17:52:12,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:52:12,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:52:12,486 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c[14371,14384] [2022-07-19 17:52:12,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:52:12,500 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:52:12,556 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c[14371,14384] [2022-07-19 17:52:12,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:52:12,568 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:52:12,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12 WrapperNode [2022-07-19 17:52:12,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:52:12,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:52:12,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:52:12,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:52:12,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,635 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 479 [2022-07-19 17:52:12,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:52:12,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:52:12,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:52:12,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:52:12,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:52:12,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:52:12,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:52:12,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:52:12,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (1/1) ... [2022-07-19 17:52:12,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:52:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:52:12,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 17:52:12,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 17:52:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:52:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:52:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:52:12,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:52:12,878 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:52:12,880 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:52:13,337 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:52:13,346 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:52:13,346 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 17:52:13,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:52:13 BoogieIcfgContainer [2022-07-19 17:52:13,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:52:13,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:52:13,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:52:13,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:52:13,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:52:12" (1/3) ... [2022-07-19 17:52:13,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e42b227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:52:13, skipping insertion in model container [2022-07-19 17:52:13,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:52:12" (2/3) ... [2022-07-19 17:52:13,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e42b227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:52:13, skipping insertion in model container [2022-07-19 17:52:13,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:52:13" (3/3) ... [2022-07-19 17:52:13,357 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c [2022-07-19 17:52:13,371 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:52:13,371 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:52:13,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:52:13,423 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7076a28e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@67f0965c [2022-07-19 17:52:13,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:52:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 17:52:13,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:13,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:13,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:13,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:13,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1418405445, now seen corresponding path program 1 times [2022-07-19 17:52:13,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:13,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850614864] [2022-07-19 17:52:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:13,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:13,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850614864] [2022-07-19 17:52:13,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850614864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:13,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:13,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 17:52:13,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521800480] [2022-07-19 17:52:13,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 17:52:13,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:13,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 17:52:13,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 17:52:13,761 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:13,802 INFO L93 Difference]: Finished difference Result 227 states and 388 transitions. [2022-07-19 17:52:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 17:52:13,804 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-19 17:52:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:13,816 INFO L225 Difference]: With dead ends: 227 [2022-07-19 17:52:13,816 INFO L226 Difference]: Without dead ends: 139 [2022-07-19 17:52:13,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 17:52:13,824 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:13,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-19 17:52:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-07-19 17:52:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.7463768115942029) internal successors, (241), 138 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2022-07-19 17:52:13,889 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 37 [2022-07-19 17:52:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:13,890 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2022-07-19 17:52:13,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2022-07-19 17:52:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 17:52:13,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:13,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:13,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:52:13,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:13,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2058913401, now seen corresponding path program 1 times [2022-07-19 17:52:13,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:13,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914695490] [2022-07-19 17:52:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:13,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:14,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:14,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914695490] [2022-07-19 17:52:14,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914695490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:14,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:14,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:52:14,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822851806] [2022-07-19 17:52:14,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:14,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:52:14,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:14,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:52:14,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:14,051 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:14,127 INFO L93 Difference]: Finished difference Result 222 states and 378 transitions. [2022-07-19 17:52:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:52:14,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-19 17:52:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:14,134 INFO L225 Difference]: With dead ends: 222 [2022-07-19 17:52:14,135 INFO L226 Difference]: Without dead ends: 139 [2022-07-19 17:52:14,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:52:14,140 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 3 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:14,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 923 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:14,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-19 17:52:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-07-19 17:52:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5289855072463767) internal successors, (211), 138 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2022-07-19 17:52:14,153 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 37 [2022-07-19 17:52:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:14,154 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2022-07-19 17:52:14,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2022-07-19 17:52:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 17:52:14,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:14,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:14,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 17:52:14,162 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:14,164 INFO L85 PathProgramCache]: Analyzing trace with hash -415118785, now seen corresponding path program 1 times [2022-07-19 17:52:14,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:14,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481154311] [2022-07-19 17:52:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:14,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:14,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:14,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481154311] [2022-07-19 17:52:14,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481154311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:14,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:14,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:52:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483105460] [2022-07-19 17:52:14,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:14,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:52:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:52:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:14,241 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:14,271 INFO L93 Difference]: Finished difference Result 287 states and 459 transitions. [2022-07-19 17:52:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:52:14,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-19 17:52:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:14,274 INFO L225 Difference]: With dead ends: 287 [2022-07-19 17:52:14,274 INFO L226 Difference]: Without dead ends: 208 [2022-07-19 17:52:14,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:14,276 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 107 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:14,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 374 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-19 17:52:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2022-07-19 17:52:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.5609756097560976) internal successors, (320), 205 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2022-07-19 17:52:14,289 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 66 [2022-07-19 17:52:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:14,289 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2022-07-19 17:52:14,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2022-07-19 17:52:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 17:52:14,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:14,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:14,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 17:52:14,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash 928134868, now seen corresponding path program 1 times [2022-07-19 17:52:14,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:14,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715120160] [2022-07-19 17:52:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:14,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:14,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:14,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715120160] [2022-07-19 17:52:14,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715120160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:14,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:14,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:52:14,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498717455] [2022-07-19 17:52:14,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:14,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:52:14,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:14,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:52:14,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:14,368 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:14,387 INFO L93 Difference]: Finished difference Result 482 states and 776 transitions. [2022-07-19 17:52:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:52:14,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2022-07-19 17:52:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:14,389 INFO L225 Difference]: With dead ends: 482 [2022-07-19 17:52:14,389 INFO L226 Difference]: Without dead ends: 336 [2022-07-19 17:52:14,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:14,391 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 109 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:14,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 386 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-19 17:52:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2022-07-19 17:52:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.5945945945945945) internal successors, (531), 333 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 531 transitions. [2022-07-19 17:52:14,412 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 531 transitions. Word has length 68 [2022-07-19 17:52:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:14,412 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 531 transitions. [2022-07-19 17:52:14,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 531 transitions. [2022-07-19 17:52:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 17:52:14,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:14,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:14,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 17:52:14,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:14,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:14,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1295175881, now seen corresponding path program 1 times [2022-07-19 17:52:14,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:14,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472786358] [2022-07-19 17:52:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:14,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472786358] [2022-07-19 17:52:14,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472786358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:14,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:14,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:52:14,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108423858] [2022-07-19 17:52:14,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:14,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:52:14,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:14,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:52:14,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:14,468 INFO L87 Difference]: Start difference. First operand 334 states and 531 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:14,500 INFO L93 Difference]: Finished difference Result 850 states and 1381 transitions. [2022-07-19 17:52:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:52:14,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-19 17:52:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:14,505 INFO L225 Difference]: With dead ends: 850 [2022-07-19 17:52:14,506 INFO L226 Difference]: Without dead ends: 576 [2022-07-19 17:52:14,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:14,511 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 103 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:14,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 387 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-07-19 17:52:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2022-07-19 17:52:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.6108202443280977) internal successors, (923), 573 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 923 transitions. [2022-07-19 17:52:14,566 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 923 transitions. Word has length 70 [2022-07-19 17:52:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:14,567 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 923 transitions. [2022-07-19 17:52:14,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 923 transitions. [2022-07-19 17:52:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 17:52:14,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:14,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:14,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 17:52:14,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:14,573 INFO L85 PathProgramCache]: Analyzing trace with hash -367652834, now seen corresponding path program 1 times [2022-07-19 17:52:14,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:14,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25730686] [2022-07-19 17:52:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:14,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:14,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:14,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25730686] [2022-07-19 17:52:14,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25730686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:14,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:14,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:52:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565956063] [2022-07-19 17:52:14,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:52:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:14,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:52:14,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:14,691 INFO L87 Difference]: Start difference. First operand 574 states and 923 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:14,848 INFO L93 Difference]: Finished difference Result 2450 states and 4045 transitions. [2022-07-19 17:52:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:52:14,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 72 [2022-07-19 17:52:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:14,859 INFO L225 Difference]: With dead ends: 2450 [2022-07-19 17:52:14,859 INFO L226 Difference]: Without dead ends: 1936 [2022-07-19 17:52:14,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:52:14,867 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 778 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:14,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 1306 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:52:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2022-07-19 17:52:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1023. [2022-07-19 17:52:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.6252446183953033) internal successors, (1661), 1022 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1661 transitions. [2022-07-19 17:52:14,921 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1661 transitions. Word has length 72 [2022-07-19 17:52:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:14,921 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1661 transitions. [2022-07-19 17:52:14,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1661 transitions. [2022-07-19 17:52:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-19 17:52:14,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:14,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:14,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 17:52:14,924 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash -435168554, now seen corresponding path program 1 times [2022-07-19 17:52:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:14,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993892401] [2022-07-19 17:52:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:14,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:15,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:15,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993892401] [2022-07-19 17:52:15,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993892401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:15,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:15,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 17:52:15,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845600139] [2022-07-19 17:52:15,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:15,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 17:52:15,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 17:52:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:52:15,003 INFO L87 Difference]: Start difference. First operand 1023 states and 1661 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2022-07-19 17:52:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:15,095 INFO L93 Difference]: Finished difference Result 2972 states and 4898 transitions. [2022-07-19 17:52:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 17:52:15,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 73 [2022-07-19 17:52:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:15,103 INFO L225 Difference]: With dead ends: 2972 [2022-07-19 17:52:15,103 INFO L226 Difference]: Without dead ends: 2009 [2022-07-19 17:52:15,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:15,106 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 385 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:15,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 689 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2022-07-19 17:52:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1507. [2022-07-19 17:52:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 1.6328021248339974) internal successors, (2459), 1506 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2459 transitions. [2022-07-19 17:52:15,162 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2459 transitions. Word has length 73 [2022-07-19 17:52:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:15,163 INFO L495 AbstractCegarLoop]: Abstraction has 1507 states and 2459 transitions. [2022-07-19 17:52:15,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2022-07-19 17:52:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2459 transitions. [2022-07-19 17:52:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 17:52:15,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:15,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:15,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 17:52:15,165 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash 152415701, now seen corresponding path program 1 times [2022-07-19 17:52:15,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:15,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452422893] [2022-07-19 17:52:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:15,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:15,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:15,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452422893] [2022-07-19 17:52:15,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452422893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:15,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:15,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:52:15,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047872463] [2022-07-19 17:52:15,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:15,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:52:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:52:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:15,204 INFO L87 Difference]: Start difference. First operand 1507 states and 2459 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:15,284 INFO L93 Difference]: Finished difference Result 2973 states and 4868 transitions. [2022-07-19 17:52:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:52:15,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2022-07-19 17:52:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:15,292 INFO L225 Difference]: With dead ends: 2973 [2022-07-19 17:52:15,293 INFO L226 Difference]: Without dead ends: 2147 [2022-07-19 17:52:15,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:15,295 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 110 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:15,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 456 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2022-07-19 17:52:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 2145. [2022-07-19 17:52:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 1.625) internal successors, (3484), 2144 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3484 transitions. [2022-07-19 17:52:15,380 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3484 transitions. Word has length 74 [2022-07-19 17:52:15,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:15,380 INFO L495 AbstractCegarLoop]: Abstraction has 2145 states and 3484 transitions. [2022-07-19 17:52:15,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3484 transitions. [2022-07-19 17:52:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 17:52:15,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:15,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:15,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 17:52:15,382 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:15,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1935815765, now seen corresponding path program 1 times [2022-07-19 17:52:15,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:15,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987504230] [2022-07-19 17:52:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:15,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:15,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:15,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987504230] [2022-07-19 17:52:15,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987504230] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:15,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:15,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 17:52:15,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822399145] [2022-07-19 17:52:15,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:15,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 17:52:15,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:15,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 17:52:15,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:52:15,436 INFO L87 Difference]: Start difference. First operand 2145 states and 3484 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:15,620 INFO L93 Difference]: Finished difference Result 6648 states and 10865 transitions. [2022-07-19 17:52:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 17:52:15,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 74 [2022-07-19 17:52:15,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:15,639 INFO L225 Difference]: With dead ends: 6648 [2022-07-19 17:52:15,639 INFO L226 Difference]: Without dead ends: 4593 [2022-07-19 17:52:15,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:15,645 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 384 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:15,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 686 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2022-07-19 17:52:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3357. [2022-07-19 17:52:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3357 states, 3356 states have (on average 1.6215733015494636) internal successors, (5442), 3356 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3357 states to 3357 states and 5442 transitions. [2022-07-19 17:52:15,845 INFO L78 Accepts]: Start accepts. Automaton has 3357 states and 5442 transitions. Word has length 74 [2022-07-19 17:52:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:15,845 INFO L495 AbstractCegarLoop]: Abstraction has 3357 states and 5442 transitions. [2022-07-19 17:52:15,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3357 states and 5442 transitions. [2022-07-19 17:52:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 17:52:15,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:15,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:15,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 17:52:15,847 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:15,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2130170379, now seen corresponding path program 1 times [2022-07-19 17:52:15,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:15,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427160816] [2022-07-19 17:52:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:15,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:15,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:15,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427160816] [2022-07-19 17:52:15,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427160816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:15,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:15,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:52:15,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106879249] [2022-07-19 17:52:15,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:15,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:52:15,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:15,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:52:15,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:15,905 INFO L87 Difference]: Start difference. First operand 3357 states and 5442 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:16,068 INFO L93 Difference]: Finished difference Result 6689 states and 10862 transitions. [2022-07-19 17:52:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:52:16,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2022-07-19 17:52:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:16,087 INFO L225 Difference]: With dead ends: 6689 [2022-07-19 17:52:16,087 INFO L226 Difference]: Without dead ends: 4777 [2022-07-19 17:52:16,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:16,091 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 104 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:16,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 439 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2022-07-19 17:52:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4775. [2022-07-19 17:52:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4775 states, 4774 states have (on average 1.6108085462924173) internal successors, (7690), 4774 states have internal predecessors, (7690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 7690 transitions. [2022-07-19 17:52:16,331 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 7690 transitions. Word has length 74 [2022-07-19 17:52:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:16,331 INFO L495 AbstractCegarLoop]: Abstraction has 4775 states and 7690 transitions. [2022-07-19 17:52:16,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 7690 transitions. [2022-07-19 17:52:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 17:52:16,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:16,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:16,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 17:52:16,334 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:16,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash 339461557, now seen corresponding path program 1 times [2022-07-19 17:52:16,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:16,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540296121] [2022-07-19 17:52:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:16,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:16,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540296121] [2022-07-19 17:52:16,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540296121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:16,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:16,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:52:16,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170279978] [2022-07-19 17:52:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:52:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:52:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:16,371 INFO L87 Difference]: Start difference. First operand 4775 states and 7690 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:16,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:16,610 INFO L93 Difference]: Finished difference Result 10486 states and 17043 transitions. [2022-07-19 17:52:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:52:16,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2022-07-19 17:52:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:16,638 INFO L225 Difference]: With dead ends: 10486 [2022-07-19 17:52:16,638 INFO L226 Difference]: Without dead ends: 7079 [2022-07-19 17:52:16,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:16,644 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 116 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:16,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 479 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2022-07-19 17:52:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7077. [2022-07-19 17:52:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 1.6075466365178066) internal successors, (11375), 7076 states have internal predecessors, (11375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 11375 transitions. [2022-07-19 17:52:16,976 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 11375 transitions. Word has length 74 [2022-07-19 17:52:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:16,976 INFO L495 AbstractCegarLoop]: Abstraction has 7077 states and 11375 transitions. [2022-07-19 17:52:16,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 11375 transitions. [2022-07-19 17:52:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-19 17:52:16,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:16,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:16,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 17:52:16,978 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:16,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:16,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1704077331, now seen corresponding path program 1 times [2022-07-19 17:52:16,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:16,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845010501] [2022-07-19 17:52:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:16,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:17,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:17,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845010501] [2022-07-19 17:52:17,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845010501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:17,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:17,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 17:52:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811172229] [2022-07-19 17:52:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:17,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 17:52:17,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 17:52:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:52:17,021 INFO L87 Difference]: Start difference. First operand 7077 states and 11375 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:17,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:17,558 INFO L93 Difference]: Finished difference Result 22184 states and 35744 transitions. [2022-07-19 17:52:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 17:52:17,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 75 [2022-07-19 17:52:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:17,599 INFO L225 Difference]: With dead ends: 22184 [2022-07-19 17:52:17,600 INFO L226 Difference]: Without dead ends: 15193 [2022-07-19 17:52:17,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:17,612 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 382 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:17,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 688 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15193 states. [2022-07-19 17:52:18,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15193 to 11092. [2022-07-19 17:52:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11092 states, 11091 states have (on average 1.5980524749797134) internal successors, (17724), 11091 states have internal predecessors, (17724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 17724 transitions. [2022-07-19 17:52:18,120 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 17724 transitions. Word has length 75 [2022-07-19 17:52:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:18,120 INFO L495 AbstractCegarLoop]: Abstraction has 11092 states and 17724 transitions. [2022-07-19 17:52:18,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:18,121 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 17724 transitions. [2022-07-19 17:52:18,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 17:52:18,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:18,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:18,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 17:52:18,123 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:18,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash 931672261, now seen corresponding path program 1 times [2022-07-19 17:52:18,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:18,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318766485] [2022-07-19 17:52:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:18,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:18,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318766485] [2022-07-19 17:52:18,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318766485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:18,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:18,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:52:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627126246] [2022-07-19 17:52:18,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:18,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:52:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:52:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:18,229 INFO L87 Difference]: Start difference. First operand 11092 states and 17724 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:18,721 INFO L93 Difference]: Finished difference Result 22100 states and 35333 transitions. [2022-07-19 17:52:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:52:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 77 [2022-07-19 17:52:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:18,748 INFO L225 Difference]: With dead ends: 22100 [2022-07-19 17:52:18,749 INFO L226 Difference]: Without dead ends: 11094 [2022-07-19 17:52:18,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:52:18,763 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 386 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:18,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 562 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11094 states. [2022-07-19 17:52:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11094 to 11092. [2022-07-19 17:52:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11092 states, 11091 states have (on average 1.5867820755567577) internal successors, (17599), 11091 states have internal predecessors, (17599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 17599 transitions. [2022-07-19 17:52:19,211 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 17599 transitions. Word has length 77 [2022-07-19 17:52:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:19,211 INFO L495 AbstractCegarLoop]: Abstraction has 11092 states and 17599 transitions. [2022-07-19 17:52:19,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 17599 transitions. [2022-07-19 17:52:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 17:52:19,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:19,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:19,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 17:52:19,213 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:19,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1222308264, now seen corresponding path program 1 times [2022-07-19 17:52:19,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:19,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038278189] [2022-07-19 17:52:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:19,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:19,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038278189] [2022-07-19 17:52:19,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038278189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:19,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:19,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:52:19,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070628283] [2022-07-19 17:52:19,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:19,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:52:19,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:52:19,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:19,298 INFO L87 Difference]: Start difference. First operand 11092 states and 17599 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:19,988 INFO L93 Difference]: Finished difference Result 31756 states and 50533 transitions. [2022-07-19 17:52:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:52:19,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 80 [2022-07-19 17:52:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:20,036 INFO L225 Difference]: With dead ends: 31756 [2022-07-19 17:52:20,036 INFO L226 Difference]: Without dead ends: 20750 [2022-07-19 17:52:20,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:52:20,055 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 178 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:20,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 750 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20750 states. [2022-07-19 17:52:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20750 to 20748. [2022-07-19 17:52:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20748 states, 20747 states have (on average 1.5742034993011038) internal successors, (32660), 20747 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20748 states to 20748 states and 32660 transitions. [2022-07-19 17:52:20,953 INFO L78 Accepts]: Start accepts. Automaton has 20748 states and 32660 transitions. Word has length 80 [2022-07-19 17:52:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:20,954 INFO L495 AbstractCegarLoop]: Abstraction has 20748 states and 32660 transitions. [2022-07-19 17:52:20,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 20748 states and 32660 transitions. [2022-07-19 17:52:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 17:52:20,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:20,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:20,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 17:52:20,956 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash 334573870, now seen corresponding path program 1 times [2022-07-19 17:52:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:20,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295082692] [2022-07-19 17:52:20,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:20,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:52:21,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:21,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295082692] [2022-07-19 17:52:21,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295082692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:21,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:21,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:52:21,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242256385] [2022-07-19 17:52:21,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:21,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:52:21,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:21,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:52:21,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:21,046 INFO L87 Difference]: Start difference. First operand 20748 states and 32660 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:22,507 INFO L93 Difference]: Finished difference Result 40559 states and 63106 transitions. [2022-07-19 17:52:22,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:52:22,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 81 [2022-07-19 17:52:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:22,616 INFO L225 Difference]: With dead ends: 40559 [2022-07-19 17:52:22,616 INFO L226 Difference]: Without dead ends: 40557 [2022-07-19 17:52:22,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:52:22,636 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 341 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:22,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 911 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40557 states. [2022-07-19 17:52:23,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40557 to 21834. [2022-07-19 17:52:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 1.5452296981633307) internal successors, (33737), 21833 states have internal predecessors, (33737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 33737 transitions. [2022-07-19 17:52:23,740 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 33737 transitions. Word has length 81 [2022-07-19 17:52:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:23,740 INFO L495 AbstractCegarLoop]: Abstraction has 21834 states and 33737 transitions. [2022-07-19 17:52:23,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 33737 transitions. [2022-07-19 17:52:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-19 17:52:23,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:23,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:23,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 17:52:23,743 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:23,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1678408875, now seen corresponding path program 1 times [2022-07-19 17:52:23,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:23,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491547632] [2022-07-19 17:52:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:23,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 17:52:23,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:23,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491547632] [2022-07-19 17:52:23,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491547632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:23,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:23,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:52:23,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362675809] [2022-07-19 17:52:23,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:23,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:52:23,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:23,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:52:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:23,811 INFO L87 Difference]: Start difference. First operand 21834 states and 33737 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:25,437 INFO L93 Difference]: Finished difference Result 53362 states and 82659 transitions. [2022-07-19 17:52:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:52:25,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 107 [2022-07-19 17:52:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:25,509 INFO L225 Difference]: With dead ends: 53362 [2022-07-19 17:52:25,509 INFO L226 Difference]: Without dead ends: 43020 [2022-07-19 17:52:25,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:52:25,537 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 488 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:25,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 907 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:52:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43020 states. [2022-07-19 17:52:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43020 to 33554. [2022-07-19 17:52:27,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33554 states, 33553 states have (on average 1.5432003099573808) internal successors, (51779), 33553 states have internal predecessors, (51779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33554 states to 33554 states and 51779 transitions. [2022-07-19 17:52:27,104 INFO L78 Accepts]: Start accepts. Automaton has 33554 states and 51779 transitions. Word has length 107 [2022-07-19 17:52:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:27,104 INFO L495 AbstractCegarLoop]: Abstraction has 33554 states and 51779 transitions. [2022-07-19 17:52:27,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 33554 states and 51779 transitions. [2022-07-19 17:52:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-19 17:52:27,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:27,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:27,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 17:52:27,108 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash 333972341, now seen corresponding path program 1 times [2022-07-19 17:52:27,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:27,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476902261] [2022-07-19 17:52:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:27,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 17:52:27,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:27,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476902261] [2022-07-19 17:52:27,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476902261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:27,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:27,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:52:27,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78496308] [2022-07-19 17:52:27,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:27,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:52:27,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:52:27,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:27,173 INFO L87 Difference]: Start difference. First operand 33554 states and 51779 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:28,786 INFO L93 Difference]: Finished difference Result 57498 states and 89067 transitions. [2022-07-19 17:52:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:52:28,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 107 [2022-07-19 17:52:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:28,862 INFO L225 Difference]: With dead ends: 57498 [2022-07-19 17:52:28,862 INFO L226 Difference]: Without dead ends: 47156 [2022-07-19 17:52:28,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:52:28,887 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 496 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:28,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 896 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47156 states. [2022-07-19 17:52:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47156 to 45454. [2022-07-19 17:52:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45454 states, 45453 states have (on average 1.54333047323609) internal successors, (70149), 45453 states have internal predecessors, (70149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45454 states to 45454 states and 70149 transitions. [2022-07-19 17:52:30,852 INFO L78 Accepts]: Start accepts. Automaton has 45454 states and 70149 transitions. Word has length 107 [2022-07-19 17:52:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:30,852 INFO L495 AbstractCegarLoop]: Abstraction has 45454 states and 70149 transitions. [2022-07-19 17:52:30,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:30,852 INFO L276 IsEmpty]: Start isEmpty. Operand 45454 states and 70149 transitions. [2022-07-19 17:52:30,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-19 17:52:30,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:30,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:30,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 17:52:30,856 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:30,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1491363019, now seen corresponding path program 1 times [2022-07-19 17:52:30,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:30,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054256983] [2022-07-19 17:52:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:30,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:52:30,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054256983] [2022-07-19 17:52:30,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054256983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:30,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:30,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:52:30,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222794656] [2022-07-19 17:52:30,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:30,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:52:30,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:30,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:52:30,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:30,915 INFO L87 Difference]: Start difference. First operand 45454 states and 70149 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:33,074 INFO L93 Difference]: Finished difference Result 64542 states and 100125 transitions. [2022-07-19 17:52:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:52:33,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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 107 [2022-07-19 17:52:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:33,165 INFO L225 Difference]: With dead ends: 64542 [2022-07-19 17:52:33,166 INFO L226 Difference]: Without dead ends: 53940 [2022-07-19 17:52:33,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:52:33,187 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 485 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:33,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 986 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:52:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53940 states. [2022-07-19 17:52:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53940 to 52238. [2022-07-19 17:52:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52238 states, 52237 states have (on average 1.5455902904071825) internal successors, (80737), 52237 states have internal predecessors, (80737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52238 states to 52238 states and 80737 transitions. [2022-07-19 17:52:35,335 INFO L78 Accepts]: Start accepts. Automaton has 52238 states and 80737 transitions. Word has length 107 [2022-07-19 17:52:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:35,336 INFO L495 AbstractCegarLoop]: Abstraction has 52238 states and 80737 transitions. [2022-07-19 17:52:35,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:35,336 INFO L276 IsEmpty]: Start isEmpty. Operand 52238 states and 80737 transitions. [2022-07-19 17:52:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-19 17:52:35,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:35,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:35,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 17:52:35,341 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:35,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:35,342 INFO L85 PathProgramCache]: Analyzing trace with hash -910445921, now seen corresponding path program 1 times [2022-07-19 17:52:35,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:35,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094227341] [2022-07-19 17:52:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:35,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:52:35,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094227341] [2022-07-19 17:52:35,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094227341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:35,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:35,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 17:52:35,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266894136] [2022-07-19 17:52:35,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 17:52:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 17:52:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:52:35,398 INFO L87 Difference]: Start difference. First operand 52238 states and 80737 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:37,674 INFO L93 Difference]: Finished difference Result 85241 states and 132386 transitions. [2022-07-19 17:52:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 17:52:37,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 108 [2022-07-19 17:52:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:37,791 INFO L225 Difference]: With dead ends: 85241 [2022-07-19 17:52:37,791 INFO L226 Difference]: Without dead ends: 67855 [2022-07-19 17:52:37,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:52:37,812 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 208 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:37,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 715 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67855 states. [2022-07-19 17:52:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67855 to 66155. [2022-07-19 17:52:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66155 states, 66154 states have (on average 1.5456510566254498) internal successors, (102251), 66154 states have internal predecessors, (102251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66155 states to 66155 states and 102251 transitions. [2022-07-19 17:52:40,669 INFO L78 Accepts]: Start accepts. Automaton has 66155 states and 102251 transitions. Word has length 108 [2022-07-19 17:52:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:40,669 INFO L495 AbstractCegarLoop]: Abstraction has 66155 states and 102251 transitions. [2022-07-19 17:52:40,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 66155 states and 102251 transitions. [2022-07-19 17:52:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-19 17:52:40,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:40,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:52:40,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 17:52:40,673 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:40,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash -487744095, now seen corresponding path program 1 times [2022-07-19 17:52:40,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:40,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883388098] [2022-07-19 17:52:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:40,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:52:40,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:40,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883388098] [2022-07-19 17:52:40,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883388098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:40,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:40,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:52:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736057390] [2022-07-19 17:52:40,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:40,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:52:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:40,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:52:40,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:40,713 INFO L87 Difference]: Start difference. First operand 66155 states and 102251 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:44,617 INFO L93 Difference]: Finished difference Result 143009 states and 221699 transitions. [2022-07-19 17:52:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:52:44,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 108 [2022-07-19 17:52:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:44,824 INFO L225 Difference]: With dead ends: 143009 [2022-07-19 17:52:44,825 INFO L226 Difference]: Without dead ends: 111843 [2022-07-19 17:52:44,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:44,868 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 92 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:44,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 382 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111843 states.