./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem11_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/eca-rers2012/Problem11_label54.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 edb6f856db72a43ad08c83ff0e1ee56d288f58300ccdf5a7b1b400a926b63cbe --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 12:43:32,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 12:43:32,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 12:43:32,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 12:43:32,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 12:43:32,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 12:43:32,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 12:43:32,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 12:43:32,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 12:43:32,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 12:43:32,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 12:43:32,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 12:43:32,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 12:43:32,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 12:43:32,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 12:43:32,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 12:43:32,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 12:43:32,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 12:43:32,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 12:43:32,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 12:43:32,334 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 12:43:32,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 12:43:32,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 12:43:32,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 12:43:32,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 12:43:32,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 12:43:32,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 12:43:32,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 12:43:32,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 12:43:32,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 12:43:32,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 12:43:32,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 12:43:32,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 12:43:32,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 12:43:32,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 12:43:32,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 12:43:32,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 12:43:32,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 12:43:32,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 12:43:32,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 12:43:32,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 12:43:32,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 12:43:32,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 12:43:32,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 12:43:32,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 12:43:32,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 12:43:32,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 12:43:32,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 12:43:32,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 12:43:32,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 12:43:32,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 12:43:32,373 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 12:43:32,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 12:43:32,374 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 12:43:32,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 12:43:32,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 12:43:32,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 12:43:32,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 12:43:32,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 12:43:32,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 12:43:32,375 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 12:43:32,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 12:43:32,376 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 12:43:32,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 12:43:32,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 12:43:32,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 12:43:32,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 12:43:32,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:43:32,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 12:43:32,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 12:43:32,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 12:43:32,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 12:43:32,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 12:43:32,378 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 12:43:32,378 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 12:43:32,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 12:43:32,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edb6f856db72a43ad08c83ff0e1ee56d288f58300ccdf5a7b1b400a926b63cbe [2022-07-13 12:43:32,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 12:43:32,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 12:43:32,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 12:43:32,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 12:43:32,643 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 12:43:32,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label54.c [2022-07-13 12:43:32,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cae9f253b/3b475a4e33b64879b1d601b3d3c39760/FLAG25f3ea075 [2022-07-13 12:43:33,179 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 12:43:33,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label54.c [2022-07-13 12:43:33,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cae9f253b/3b475a4e33b64879b1d601b3d3c39760/FLAG25f3ea075 [2022-07-13 12:43:33,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cae9f253b/3b475a4e33b64879b1d601b3d3c39760 [2022-07-13 12:43:33,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 12:43:33,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 12:43:33,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 12:43:33,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 12:43:33,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 12:43:33,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:43:33" (1/1) ... [2022-07-13 12:43:33,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@738472c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:33, skipping insertion in model container [2022-07-13 12:43:33,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:43:33" (1/1) ... [2022-07-13 12:43:33,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 12:43:33,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 12:43:33,902 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/eca-rers2012/Problem11_label54.c[5423,5436] [2022-07-13 12:43:34,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:43:34,116 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 12:43:34,134 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/eca-rers2012/Problem11_label54.c[5423,5436] [2022-07-13 12:43:34,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:43:34,303 INFO L208 MainTranslator]: Completed translation [2022-07-13 12:43:34,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34 WrapperNode [2022-07-13 12:43:34,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 12:43:34,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 12:43:34,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 12:43:34,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 12:43:34,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,438 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2022-07-13 12:43:34,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 12:43:34,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 12:43:34,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 12:43:34,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 12:43:34,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 12:43:34,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 12:43:34,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 12:43:34,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 12:43:34,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (1/1) ... [2022-07-13 12:43:34,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:43:34,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:43:34,588 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) [2022-07-13 12:43:34,599 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 [2022-07-13 12:43:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 12:43:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 12:43:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 12:43:34,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 12:43:34,686 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 12:43:34,687 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 12:43:36,002 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 12:43:36,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 12:43:36,029 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 12:43:36,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:43:36 BoogieIcfgContainer [2022-07-13 12:43:36,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 12:43:36,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 12:43:36,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 12:43:36,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 12:43:36,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 12:43:33" (1/3) ... [2022-07-13 12:43:36,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4539361d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:43:36, skipping insertion in model container [2022-07-13 12:43:36,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:43:34" (2/3) ... [2022-07-13 12:43:36,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4539361d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:43:36, skipping insertion in model container [2022-07-13 12:43:36,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:43:36" (3/3) ... [2022-07-13 12:43:36,043 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label54.c [2022-07-13 12:43:36,059 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 12:43:36,059 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 12:43:36,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 12:43:36,139 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@740f49c1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5d59e511 [2022-07-13 12:43:36,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 12:43:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 12:43:36,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:36,165 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] [2022-07-13 12:43:36,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times [2022-07-13 12:43:36,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:36,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626643343] [2022-07-13 12:43:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:36,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:43:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:36,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626643343] [2022-07-13 12:43:36,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626643343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:36,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:36,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:43:36,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273884878] [2022-07-13 12:43:36,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:36,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:36,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:36,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:36,473 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 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 3 states, 3 states have (on average 12.333333333333334) 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) [2022-07-13 12:43:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:37,539 INFO L93 Difference]: Finished difference Result 763 states and 1352 transitions. [2022-07-13 12:43:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:37,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) 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 [2022-07-13 12:43:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:37,554 INFO L225 Difference]: With dead ends: 763 [2022-07-13 12:43:37,554 INFO L226 Difference]: Without dead ends: 416 [2022-07-13 12:43:37,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:37,561 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 236 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:37,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 89 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 12:43:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-07-13 12:43:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 408. [2022-07-13 12:43:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.6142506142506143) internal successors, (657), 407 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 657 transitions. [2022-07-13 12:43:37,613 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 657 transitions. Word has length 37 [2022-07-13 12:43:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:37,614 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 657 transitions. [2022-07-13 12:43:37,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) 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) [2022-07-13 12:43:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 657 transitions. [2022-07-13 12:43:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-13 12:43:37,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:37,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:43:37,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 12:43:37,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:37,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1296179654, now seen corresponding path program 1 times [2022-07-13 12:43:37,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:37,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051737887] [2022-07-13 12:43:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:37,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:43:37,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051737887] [2022-07-13 12:43:37,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051737887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:37,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:37,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:43:37,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399722579] [2022-07-13 12:43:37,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:37,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:37,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:37,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:37,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:37,728 INFO L87 Difference]: Start difference. First operand 408 states and 657 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:38,452 INFO L93 Difference]: Finished difference Result 1191 states and 1930 transitions. [2022-07-13 12:43:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:38,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2022-07-13 12:43:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:38,457 INFO L225 Difference]: With dead ends: 1191 [2022-07-13 12:43:38,457 INFO L226 Difference]: Without dead ends: 785 [2022-07-13 12:43:38,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:38,460 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 141 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:38,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 152 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 12:43:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-13 12:43:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 783. [2022-07-13 12:43:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.438618925831202) internal successors, (1125), 782 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1125 transitions. [2022-07-13 12:43:38,488 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1125 transitions. Word has length 102 [2022-07-13 12:43:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:38,489 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 1125 transitions. [2022-07-13 12:43:38,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:38,489 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1125 transitions. [2022-07-13 12:43:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-13 12:43:38,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:38,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:43:38,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 12:43:38,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1017074320, now seen corresponding path program 1 times [2022-07-13 12:43:38,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:38,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816847294] [2022-07-13 12:43:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:43:38,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:38,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816847294] [2022-07-13 12:43:38,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816847294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:38,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:38,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:43:38,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702520692] [2022-07-13 12:43:38,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:38,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:38,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:38,577 INFO L87 Difference]: Start difference. First operand 783 states and 1125 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:39,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:39,294 INFO L93 Difference]: Finished difference Result 1948 states and 2801 transitions. [2022-07-13 12:43:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:39,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2022-07-13 12:43:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:39,299 INFO L225 Difference]: With dead ends: 1948 [2022-07-13 12:43:39,299 INFO L226 Difference]: Without dead ends: 1167 [2022-07-13 12:43:39,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:39,301 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 144 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:39,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 116 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 12:43:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-07-13 12:43:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1154. [2022-07-13 12:43:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 1.3391153512575888) internal successors, (1544), 1153 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1544 transitions. [2022-07-13 12:43:39,330 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1544 transitions. Word has length 105 [2022-07-13 12:43:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:39,330 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1544 transitions. [2022-07-13 12:43:39,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1544 transitions. [2022-07-13 12:43:39,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 12:43:39,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:39,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:43:39,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 12:43:39,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash -166569456, now seen corresponding path program 1 times [2022-07-13 12:43:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:39,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455461021] [2022-07-13 12:43:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:39,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:43:39,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:39,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455461021] [2022-07-13 12:43:39,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455461021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:39,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:39,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:43:39,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063357562] [2022-07-13 12:43:39,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:39,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:39,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:39,453 INFO L87 Difference]: Start difference. First operand 1154 states and 1544 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 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) [2022-07-13 12:43:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:40,128 INFO L93 Difference]: Finished difference Result 2676 states and 3529 transitions. [2022-07-13 12:43:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:40,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 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 106 [2022-07-13 12:43:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:40,134 INFO L225 Difference]: With dead ends: 2676 [2022-07-13 12:43:40,134 INFO L226 Difference]: Without dead ends: 1524 [2022-07-13 12:43:40,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:40,136 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:40,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 189 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:43:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2022-07-13 12:43:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1523. [2022-07-13 12:43:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 1.268725361366623) internal successors, (1931), 1522 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 1931 transitions. [2022-07-13 12:43:40,166 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 1931 transitions. Word has length 106 [2022-07-13 12:43:40,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:40,167 INFO L495 AbstractCegarLoop]: Abstraction has 1523 states and 1931 transitions. [2022-07-13 12:43:40,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 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) [2022-07-13 12:43:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 1931 transitions. [2022-07-13 12:43:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-13 12:43:40,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:40,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:43:40,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 12:43:40,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2070966061, now seen corresponding path program 1 times [2022-07-13 12:43:40,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:40,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709886283] [2022-07-13 12:43:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:40,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:43:40,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:40,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709886283] [2022-07-13 12:43:40,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709886283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:40,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:40,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:43:40,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104334549] [2022-07-13 12:43:40,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:40,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:40,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:40,294 INFO L87 Difference]: Start difference. First operand 1523 states and 1931 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:40,938 INFO L93 Difference]: Finished difference Result 3968 states and 5151 transitions. [2022-07-13 12:43:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:40,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-07-13 12:43:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:40,947 INFO L225 Difference]: With dead ends: 3968 [2022-07-13 12:43:40,947 INFO L226 Difference]: Without dead ends: 2631 [2022-07-13 12:43:40,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:40,950 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 115 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:40,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 154 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:43:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-07-13 12:43:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2447. [2022-07-13 12:43:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 1.2236304170073589) internal successors, (2993), 2446 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 2993 transitions. [2022-07-13 12:43:40,991 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 2993 transitions. Word has length 164 [2022-07-13 12:43:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:40,991 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 2993 transitions. [2022-07-13 12:43:40,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 2993 transitions. [2022-07-13 12:43:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-13 12:43:40,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:40,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:43:40,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 12:43:40,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash -558806157, now seen corresponding path program 1 times [2022-07-13 12:43:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:40,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141759766] [2022-07-13 12:43:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:40,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 12:43:41,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:41,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141759766] [2022-07-13 12:43:41,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141759766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:41,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:41,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:43:41,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096037502] [2022-07-13 12:43:41,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:41,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:41,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:41,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:41,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:41,118 INFO L87 Difference]: Start difference. First operand 2447 states and 2993 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:41,725 INFO L93 Difference]: Finished difference Result 5266 states and 6463 transitions. [2022-07-13 12:43:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:41,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 180 [2022-07-13 12:43:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:41,736 INFO L225 Difference]: With dead ends: 5266 [2022-07-13 12:43:41,736 INFO L226 Difference]: Without dead ends: 3005 [2022-07-13 12:43:41,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:41,742 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 75 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:41,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 153 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:43:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2022-07-13 12:43:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2820. [2022-07-13 12:43:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 2819 states have (on average 1.2220645619013835) internal successors, (3445), 2819 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 3445 transitions. [2022-07-13 12:43:41,823 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 3445 transitions. Word has length 180 [2022-07-13 12:43:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:41,824 INFO L495 AbstractCegarLoop]: Abstraction has 2820 states and 3445 transitions. [2022-07-13 12:43:41,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 3445 transitions. [2022-07-13 12:43:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-13 12:43:41,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:41,827 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:43:41,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 12:43:41,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:41,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1961217037, now seen corresponding path program 1 times [2022-07-13 12:43:41,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:41,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347355558] [2022-07-13 12:43:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:41,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:43:41,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:41,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347355558] [2022-07-13 12:43:41,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347355558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:41,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:41,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:41,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161337900] [2022-07-13 12:43:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:41,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:41,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:41,967 INFO L87 Difference]: Start difference. First operand 2820 states and 3445 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:42,632 INFO L93 Difference]: Finished difference Result 6567 states and 8101 transitions. [2022-07-13 12:43:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:42,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2022-07-13 12:43:42,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:42,646 INFO L225 Difference]: With dead ends: 6567 [2022-07-13 12:43:42,646 INFO L226 Difference]: Without dead ends: 3933 [2022-07-13 12:43:42,650 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 [2022-07-13 12:43:42,651 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 135 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:42,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 332 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:43:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2022-07-13 12:43:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3556. [2022-07-13 12:43:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 1.2115330520393812) internal successors, (4307), 3555 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 4307 transitions. [2022-07-13 12:43:42,739 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 4307 transitions. Word has length 217 [2022-07-13 12:43:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:42,740 INFO L495 AbstractCegarLoop]: Abstraction has 3556 states and 4307 transitions. [2022-07-13 12:43:42,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 4307 transitions. [2022-07-13 12:43:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-13 12:43:42,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:42,743 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:43:42,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 12:43:42,743 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:42,744 INFO L85 PathProgramCache]: Analyzing trace with hash 629777389, now seen corresponding path program 1 times [2022-07-13 12:43:42,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:42,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827184366] [2022-07-13 12:43:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:42,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 12:43:42,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:42,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827184366] [2022-07-13 12:43:42,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827184366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:42,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:42,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284532463] [2022-07-13 12:43:42,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:42,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:42,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:42,842 INFO L87 Difference]: Start difference. First operand 3556 states and 4307 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:43,572 INFO L93 Difference]: Finished difference Result 9521 states and 11627 transitions. [2022-07-13 12:43:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 218 [2022-07-13 12:43:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:43,622 INFO L225 Difference]: With dead ends: 9521 [2022-07-13 12:43:43,623 INFO L226 Difference]: Without dead ends: 5967 [2022-07-13 12:43:43,628 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 [2022-07-13 12:43:43,628 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 189 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:43,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 332 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 12:43:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5967 states. [2022-07-13 12:43:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5967 to 5231. [2022-07-13 12:43:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 5230 states have (on average 1.2061185468451243) internal successors, (6308), 5230 states have internal predecessors, (6308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 6308 transitions. [2022-07-13 12:43:43,719 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 6308 transitions. Word has length 218 [2022-07-13 12:43:43,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:43,720 INFO L495 AbstractCegarLoop]: Abstraction has 5231 states and 6308 transitions. [2022-07-13 12:43:43,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 6308 transitions. [2022-07-13 12:43:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-13 12:43:43,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:43,724 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:43:43,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 12:43:43,725 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash 216235323, now seen corresponding path program 1 times [2022-07-13 12:43:43,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:43,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382740979] [2022-07-13 12:43:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:43:43,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:43,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382740979] [2022-07-13 12:43:43,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382740979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:43,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:43,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:43,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003832785] [2022-07-13 12:43:43,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:43,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:43,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:43,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:43,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:43,862 INFO L87 Difference]: Start difference. First operand 5231 states and 6308 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:44,512 INFO L93 Difference]: Finished difference Result 10457 states and 12611 transitions. [2022-07-13 12:43:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 255 [2022-07-13 12:43:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:44,529 INFO L225 Difference]: With dead ends: 10457 [2022-07-13 12:43:44,530 INFO L226 Difference]: Without dead ends: 5228 [2022-07-13 12:43:44,536 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 [2022-07-13 12:43:44,538 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 142 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:44,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 304 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:43:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2022-07-13 12:43:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 5228. [2022-07-13 12:43:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5228 states, 5227 states have (on average 1.178687583700019) internal successors, (6161), 5227 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5228 states to 5228 states and 6161 transitions. [2022-07-13 12:43:44,662 INFO L78 Accepts]: Start accepts. Automaton has 5228 states and 6161 transitions. Word has length 255 [2022-07-13 12:43:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:44,666 INFO L495 AbstractCegarLoop]: Abstraction has 5228 states and 6161 transitions. [2022-07-13 12:43:44,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5228 states and 6161 transitions. [2022-07-13 12:43:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-07-13 12:43:44,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:44,670 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:43:44,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 12:43:44,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2143692386, now seen corresponding path program 1 times [2022-07-13 12:43:44,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:44,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340966492] [2022-07-13 12:43:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:44,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-13 12:43:44,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:44,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340966492] [2022-07-13 12:43:44,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340966492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:44,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:44,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707557980] [2022-07-13 12:43:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:44,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:44,824 INFO L87 Difference]: Start difference. First operand 5228 states and 6161 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:45,462 INFO L93 Difference]: Finished difference Result 11195 states and 13196 transitions. [2022-07-13 12:43:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 269 [2022-07-13 12:43:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:45,481 INFO L225 Difference]: With dead ends: 11195 [2022-07-13 12:43:45,481 INFO L226 Difference]: Without dead ends: 5969 [2022-07-13 12:43:45,488 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 [2022-07-13 12:43:45,489 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 185 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:45,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 148 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:43:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2022-07-13 12:43:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 5228. [2022-07-13 12:43:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5228 states, 5227 states have (on average 1.178687583700019) internal successors, (6161), 5227 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5228 states to 5228 states and 6161 transitions. [2022-07-13 12:43:45,604 INFO L78 Accepts]: Start accepts. Automaton has 5228 states and 6161 transitions. Word has length 269 [2022-07-13 12:43:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:45,604 INFO L495 AbstractCegarLoop]: Abstraction has 5228 states and 6161 transitions. [2022-07-13 12:43:45,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:45,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5228 states and 6161 transitions. [2022-07-13 12:43:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-13 12:43:45,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:45,610 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:43:45,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 12:43:45,611 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1892161860, now seen corresponding path program 1 times [2022-07-13 12:43:45,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:45,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105666843] [2022-07-13 12:43:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:45,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-13 12:43:45,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:45,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105666843] [2022-07-13 12:43:45,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105666843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:45,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:45,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:45,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692749493] [2022-07-13 12:43:45,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:45,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:45,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:45,743 INFO L87 Difference]: Start difference. First operand 5228 states and 6161 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:46,490 INFO L93 Difference]: Finished difference Result 12849 states and 15240 transitions. [2022-07-13 12:43:46,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:46,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 272 [2022-07-13 12:43:46,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:46,505 INFO L225 Difference]: With dead ends: 12849 [2022-07-13 12:43:46,506 INFO L226 Difference]: Without dead ends: 7623 [2022-07-13 12:43:46,512 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 [2022-07-13 12:43:46,513 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 197 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:46,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 71 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 12:43:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7623 states. [2022-07-13 12:43:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7623 to 7252. [2022-07-13 12:43:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 1.1842504482140395) internal successors, (8587), 7251 states have internal predecessors, (8587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 8587 transitions. [2022-07-13 12:43:46,647 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 8587 transitions. Word has length 272 [2022-07-13 12:43:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:46,648 INFO L495 AbstractCegarLoop]: Abstraction has 7252 states and 8587 transitions. [2022-07-13 12:43:46,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 8587 transitions. [2022-07-13 12:43:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-07-13 12:43:46,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:46,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-13 12:43:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 12:43:46,656 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash -218760648, now seen corresponding path program 1 times [2022-07-13 12:43:46,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:46,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127616878] [2022-07-13 12:43:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:46,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-13 12:43:46,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:46,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127616878] [2022-07-13 12:43:46,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127616878] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:46,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:46,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:46,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187407990] [2022-07-13 12:43:46,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:46,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:46,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:46,794 INFO L87 Difference]: Start difference. First operand 7252 states and 8587 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:47,400 INFO L93 Difference]: Finished difference Result 15789 states and 18676 transitions. [2022-07-13 12:43:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:47,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 310 [2022-07-13 12:43:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:47,416 INFO L225 Difference]: With dead ends: 15789 [2022-07-13 12:43:47,416 INFO L226 Difference]: Without dead ends: 8539 [2022-07-13 12:43:47,425 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 [2022-07-13 12:43:47,426 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 185 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:47,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 146 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 12:43:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8539 states. [2022-07-13 12:43:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8539 to 6143. [2022-07-13 12:43:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6143 states, 6142 states have (on average 1.1859329208726799) internal successors, (7284), 6142 states have internal predecessors, (7284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6143 states to 6143 states and 7284 transitions. [2022-07-13 12:43:47,559 INFO L78 Accepts]: Start accepts. Automaton has 6143 states and 7284 transitions. Word has length 310 [2022-07-13 12:43:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:47,560 INFO L495 AbstractCegarLoop]: Abstraction has 6143 states and 7284 transitions. [2022-07-13 12:43:47,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6143 states and 7284 transitions. [2022-07-13 12:43:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-07-13 12:43:47,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:47,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:43:47,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 12:43:47,568 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1789936803, now seen corresponding path program 1 times [2022-07-13 12:43:47,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:47,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945688081] [2022-07-13 12:43:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 12:43:47,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:47,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945688081] [2022-07-13 12:43:47,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945688081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:47,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:47,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:47,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142289317] [2022-07-13 12:43:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:47,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:43:47,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:47,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:43:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:43:47,806 INFO L87 Difference]: Start difference. First operand 6143 states and 7284 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:48,621 INFO L93 Difference]: Finished difference Result 14510 states and 17070 transitions. [2022-07-13 12:43:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:43:48,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 320 [2022-07-13 12:43:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:48,635 INFO L225 Difference]: With dead ends: 14510 [2022-07-13 12:43:48,635 INFO L226 Difference]: Without dead ends: 8355 [2022-07-13 12:43:48,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:43:48,643 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 71 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:48,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 162 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 12:43:48,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8355 states. [2022-07-13 12:43:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8355 to 8170. [2022-07-13 12:43:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8170 states, 8169 states have (on average 1.1726037458685274) internal successors, (9579), 8169 states have internal predecessors, (9579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 9579 transitions. [2022-07-13 12:43:48,758 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 9579 transitions. Word has length 320 [2022-07-13 12:43:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:48,759 INFO L495 AbstractCegarLoop]: Abstraction has 8170 states and 9579 transitions. [2022-07-13 12:43:48,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 9579 transitions. [2022-07-13 12:43:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-07-13 12:43:48,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:48,772 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:43:48,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 12:43:48,773 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:48,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1148105623, now seen corresponding path program 1 times [2022-07-13 12:43:48,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:48,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371304900] [2022-07-13 12:43:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:48,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-13 12:43:48,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:48,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371304900] [2022-07-13 12:43:48,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371304900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:48,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:48,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 12:43:48,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518935303] [2022-07-13 12:43:48,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:48,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:43:48,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:43:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:43:48,948 INFO L87 Difference]: Start difference. First operand 8170 states and 9579 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:50,139 INFO L93 Difference]: Finished difference Result 21877 states and 25680 transitions. [2022-07-13 12:43:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:43:50,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 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 394 [2022-07-13 12:43:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:50,161 INFO L225 Difference]: With dead ends: 21877 [2022-07-13 12:43:50,162 INFO L226 Difference]: Without dead ends: 14077 [2022-07-13 12:43:50,170 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 [2022-07-13 12:43:50,171 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 294 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:50,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 91 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 12:43:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14077 states. [2022-07-13 12:43:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14077 to 12973. [2022-07-13 12:43:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12973 states, 12972 states have (on average 1.1669750231267344) internal successors, (15138), 12972 states have internal predecessors, (15138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12973 states to 12973 states and 15138 transitions. [2022-07-13 12:43:50,340 INFO L78 Accepts]: Start accepts. Automaton has 12973 states and 15138 transitions. Word has length 394 [2022-07-13 12:43:50,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:50,341 INFO L495 AbstractCegarLoop]: Abstraction has 12973 states and 15138 transitions. [2022-07-13 12:43:50,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand 12973 states and 15138 transitions. [2022-07-13 12:43:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-07-13 12:43:50,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:50,359 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:43:50,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 12:43:50,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash 917869103, now seen corresponding path program 1 times [2022-07-13 12:43:50,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:50,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817673751] [2022-07-13 12:43:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:50,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 12:43:50,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:50,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817673751] [2022-07-13 12:43:50,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817673751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:50,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:50,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:50,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671573945] [2022-07-13 12:43:50,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:50,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:43:50,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:43:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:43:50,513 INFO L87 Difference]: Start difference. First operand 12973 states and 15138 transitions. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:51,493 INFO L93 Difference]: Finished difference Result 32968 states and 38384 transitions. [2022-07-13 12:43:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:43:51,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 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 447 [2022-07-13 12:43:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:51,526 INFO L225 Difference]: With dead ends: 32968 [2022-07-13 12:43:51,526 INFO L226 Difference]: Without dead ends: 20365 [2022-07-13 12:43:51,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:43:51,542 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 239 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:51,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 76 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 12:43:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20365 states. [2022-07-13 12:43:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20365 to 17777. [2022-07-13 12:43:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17777 states, 17776 states have (on average 1.161284878487849) internal successors, (20643), 17776 states have internal predecessors, (20643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17777 states to 17777 states and 20643 transitions. [2022-07-13 12:43:51,851 INFO L78 Accepts]: Start accepts. Automaton has 17777 states and 20643 transitions. Word has length 447 [2022-07-13 12:43:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:51,852 INFO L495 AbstractCegarLoop]: Abstraction has 17777 states and 20643 transitions. [2022-07-13 12:43:51,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 17777 states and 20643 transitions. [2022-07-13 12:43:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2022-07-13 12:43:51,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:51,872 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-07-13 12:43:51,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 12:43:51,873 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -395850802, now seen corresponding path program 1 times [2022-07-13 12:43:51,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:51,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100071810] [2022-07-13 12:43:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:51,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 428 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-07-13 12:43:52,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:52,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100071810] [2022-07-13 12:43:52,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100071810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:52,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:52,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:52,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721380697] [2022-07-13 12:43:52,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:52,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:52,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:52,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:52,074 INFO L87 Difference]: Start difference. First operand 17777 states and 20643 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:52,790 INFO L93 Difference]: Finished difference Result 34442 states and 40071 transitions. [2022-07-13 12:43:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:52,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 514 [2022-07-13 12:43:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:52,816 INFO L225 Difference]: With dead ends: 34442 [2022-07-13 12:43:52,816 INFO L226 Difference]: Without dead ends: 17035 [2022-07-13 12:43:52,824 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 [2022-07-13 12:43:52,825 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 67 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:52,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 311 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:43:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17035 states. [2022-07-13 12:43:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17035 to 12601. [2022-07-13 12:43:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12601 states, 12600 states have (on average 1.1617460317460317) internal successors, (14638), 12600 states have internal predecessors, (14638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12601 states to 12601 states and 14638 transitions. [2022-07-13 12:43:52,975 INFO L78 Accepts]: Start accepts. Automaton has 12601 states and 14638 transitions. Word has length 514 [2022-07-13 12:43:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:52,976 INFO L495 AbstractCegarLoop]: Abstraction has 12601 states and 14638 transitions. [2022-07-13 12:43:52,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 12601 states and 14638 transitions. [2022-07-13 12:43:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-07-13 12:43:52,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:52,993 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:43:52,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 12:43:52,993 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:52,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:52,994 INFO L85 PathProgramCache]: Analyzing trace with hash -584826003, now seen corresponding path program 1 times [2022-07-13 12:43:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:52,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716208057] [2022-07-13 12:43:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-07-13 12:43:53,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:53,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716208057] [2022-07-13 12:43:53,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716208057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:53,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:53,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 12:43:53,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472877232] [2022-07-13 12:43:53,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:53,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:43:53,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:53,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:43:53,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:43:53,258 INFO L87 Difference]: Start difference. First operand 12601 states and 14638 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:54,356 INFO L93 Difference]: Finished difference Result 28899 states and 33610 transitions. [2022-07-13 12:43:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:43:54,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 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 535 [2022-07-13 12:43:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:54,380 INFO L225 Difference]: With dead ends: 28899 [2022-07-13 12:43:54,380 INFO L226 Difference]: Without dead ends: 16668 [2022-07-13 12:43:54,391 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 [2022-07-13 12:43:54,393 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 298 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:54,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 85 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 12:43:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16668 states. [2022-07-13 12:43:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16668 to 12049. [2022-07-13 12:43:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12049 states, 12048 states have (on average 1.1661686586985391) internal successors, (14050), 12048 states have internal predecessors, (14050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12049 states to 12049 states and 14050 transitions. [2022-07-13 12:43:54,619 INFO L78 Accepts]: Start accepts. Automaton has 12049 states and 14050 transitions. Word has length 535 [2022-07-13 12:43:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:54,620 INFO L495 AbstractCegarLoop]: Abstraction has 12049 states and 14050 transitions. [2022-07-13 12:43:54,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 12049 states and 14050 transitions. [2022-07-13 12:43:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-07-13 12:43:54,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:54,643 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:43:54,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 12:43:54,643 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:54,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:54,644 INFO L85 PathProgramCache]: Analyzing trace with hash -861206840, now seen corresponding path program 1 times [2022-07-13 12:43:54,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:54,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886653835] [2022-07-13 12:43:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:54,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 705 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-13 12:43:54,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:54,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886653835] [2022-07-13 12:43:54,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886653835] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:54,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:54,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 12:43:54,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760315023] [2022-07-13 12:43:54,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:54,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:43:54,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:43:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:43:54,871 INFO L87 Difference]: Start difference. First operand 12049 states and 14050 transitions. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:56,080 INFO L93 Difference]: Finished difference Result 30746 states and 35969 transitions. [2022-07-13 12:43:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:43:56,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 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 561 [2022-07-13 12:43:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:56,101 INFO L225 Difference]: With dead ends: 30746 [2022-07-13 12:43:56,102 INFO L226 Difference]: Without dead ends: 19067 [2022-07-13 12:43:56,113 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 [2022-07-13 12:43:56,114 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 185 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:56,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 86 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 12:43:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19067 states. [2022-07-13 12:43:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19067 to 14453. [2022-07-13 12:43:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14453 states, 14452 states have (on average 1.17153335178522) internal successors, (16931), 14452 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14453 states to 14453 states and 16931 transitions. [2022-07-13 12:43:56,369 INFO L78 Accepts]: Start accepts. Automaton has 14453 states and 16931 transitions. Word has length 561 [2022-07-13 12:43:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:56,370 INFO L495 AbstractCegarLoop]: Abstraction has 14453 states and 16931 transitions. [2022-07-13 12:43:56,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 14453 states and 16931 transitions. [2022-07-13 12:43:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2022-07-13 12:43:56,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:56,394 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:43:56,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 12:43:56,394 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash 802140522, now seen corresponding path program 1 times [2022-07-13 12:43:56,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:56,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79181880] [2022-07-13 12:43:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:56,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-07-13 12:43:56,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:56,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79181880] [2022-07-13 12:43:56,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79181880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:56,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:43:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95260296] [2022-07-13 12:43:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:56,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:56,610 INFO L87 Difference]: Start difference. First operand 14453 states and 16931 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:57,024 INFO L93 Difference]: Finished difference Result 28527 states and 33465 transitions. [2022-07-13 12:43:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:57,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 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 602 [2022-07-13 12:43:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:57,037 INFO L225 Difference]: With dead ends: 28527 [2022-07-13 12:43:57,037 INFO L226 Difference]: Without dead ends: 14444 [2022-07-13 12:43:57,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:57,044 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 188 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:57,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 39 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 12:43:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14444 states. [2022-07-13 12:43:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14444 to 14440. [2022-07-13 12:43:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14440 states, 14439 states have (on average 1.1708567075282221) internal successors, (16906), 14439 states have internal predecessors, (16906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14440 states to 14440 states and 16906 transitions. [2022-07-13 12:43:57,218 INFO L78 Accepts]: Start accepts. Automaton has 14440 states and 16906 transitions. Word has length 602 [2022-07-13 12:43:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:57,218 INFO L495 AbstractCegarLoop]: Abstraction has 14440 states and 16906 transitions. [2022-07-13 12:43:57,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14440 states and 16906 transitions. [2022-07-13 12:43:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-07-13 12:43:57,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:57,233 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-07-13 12:43:57,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 12:43:57,234 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1745204086, now seen corresponding path program 1 times [2022-07-13 12:43:57,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:57,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610431520] [2022-07-13 12:43:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:57,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 594 proven. 0 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2022-07-13 12:43:57,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:57,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610431520] [2022-07-13 12:43:57,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610431520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:43:57,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:43:57,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:43:57,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654757083] [2022-07-13 12:43:57,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:43:57,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:43:57,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:43:57,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:43:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:43:57,499 INFO L87 Difference]: Start difference. First operand 14440 states and 16906 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:43:58,213 INFO L93 Difference]: Finished difference Result 30547 states and 35892 transitions. [2022-07-13 12:43:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:43:58,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 622 [2022-07-13 12:43:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:43:58,232 INFO L225 Difference]: With dead ends: 30547 [2022-07-13 12:43:58,232 INFO L226 Difference]: Without dead ends: 16291 [2022-07-13 12:43:58,242 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 [2022-07-13 12:43:58,243 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:43:58,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 370 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:43:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16291 states. [2022-07-13 12:43:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16291 to 15172. [2022-07-13 12:43:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15172 states, 15171 states have (on average 1.139147056884846) internal successors, (17282), 15171 states have internal predecessors, (17282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15172 states to 15172 states and 17282 transitions. [2022-07-13 12:43:58,444 INFO L78 Accepts]: Start accepts. Automaton has 15172 states and 17282 transitions. Word has length 622 [2022-07-13 12:43:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:43:58,445 INFO L495 AbstractCegarLoop]: Abstraction has 15172 states and 17282 transitions. [2022-07-13 12:43:58,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:43:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 15172 states and 17282 transitions. [2022-07-13 12:43:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2022-07-13 12:43:58,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:43:58,457 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:43:58,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 12:43:58,457 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:43:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:43:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1165858962, now seen corresponding path program 1 times [2022-07-13 12:43:58,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:43:58,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768253452] [2022-07-13 12:43:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:58,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:43:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 621 proven. 154 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-13 12:43:58,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:43:58,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768253452] [2022-07-13 12:43:58,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768253452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:43:58,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874002524] [2022-07-13 12:43:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:43:58,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:43:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:43:58,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 12:43:58,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 12:43:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:43:58,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 12:43:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:44:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 621 proven. 154 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-13 12:44:00,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 12:44:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 621 proven. 154 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-13 12:44:01,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874002524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 12:44:01,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 12:44:01,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-07-13 12:44:01,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896555350] [2022-07-13 12:44:01,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 12:44:01,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 12:44:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 12:44:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:44:01,844 INFO L87 Difference]: Start difference. First operand 15172 states and 17282 transitions. Second operand has 5 states, 5 states have (on average 93.8) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:03,154 INFO L93 Difference]: Finished difference Result 33219 states and 37863 transitions. [2022-07-13 12:44:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 12:44:03,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 93.8) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 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 626 [2022-07-13 12:44:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:03,173 INFO L225 Difference]: With dead ends: 33219 [2022-07-13 12:44:03,174 INFO L226 Difference]: Without dead ends: 18049 [2022-07-13 12:44:03,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1256 GetRequests, 1246 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 12:44:03,184 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 411 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:03,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 61 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 12:44:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18049 states. [2022-07-13 12:44:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18049 to 15157. [2022-07-13 12:44:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15157 states, 15156 states have (on average 1.1211401425178147) internal successors, (16992), 15156 states have internal predecessors, (16992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15157 states to 15157 states and 16992 transitions. [2022-07-13 12:44:03,412 INFO L78 Accepts]: Start accepts. Automaton has 15157 states and 16992 transitions. Word has length 626 [2022-07-13 12:44:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:03,413 INFO L495 AbstractCegarLoop]: Abstraction has 15157 states and 16992 transitions. [2022-07-13 12:44:03,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.8) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 15157 states and 16992 transitions. [2022-07-13 12:44:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2022-07-13 12:44:03,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:44:03,426 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:44:03,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 12:44:03,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-13 12:44:03,627 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:44:03,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:44:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1097980107, now seen corresponding path program 1 times [2022-07-13 12:44:03,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:44:03,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268572147] [2022-07-13 12:44:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:44:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 847 proven. 240 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-13 12:44:03,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:44:03,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268572147] [2022-07-13 12:44:03,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268572147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:44:03,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152941571] [2022-07-13 12:44:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:03,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:44:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:44:03,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 12:44:03,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 12:44:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:04,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 12:44:04,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:44:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 852 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-07-13 12:44:04,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:44:04,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152941571] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:44:04,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:44:04,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-13 12:44:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896344244] [2022-07-13 12:44:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:44:04,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:44:04,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:44:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 12:44:04,313 INFO L87 Difference]: Start difference. First operand 15157 states and 16992 transitions. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:05,059 INFO L93 Difference]: Finished difference Result 30316 states and 33984 transitions. [2022-07-13 12:44:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:44:05,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 639 [2022-07-13 12:44:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:05,074 INFO L225 Difference]: With dead ends: 30316 [2022-07-13 12:44:05,074 INFO L226 Difference]: Without dead ends: 15345 [2022-07-13 12:44:05,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 12:44:05,085 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 112 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:05,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 346 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:44:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15345 states. [2022-07-13 12:44:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15345 to 15157. [2022-07-13 12:44:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15157 states, 15156 states have (on average 1.103853259435207) internal successors, (16730), 15156 states have internal predecessors, (16730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15157 states to 15157 states and 16730 transitions. [2022-07-13 12:44:05,239 INFO L78 Accepts]: Start accepts. Automaton has 15157 states and 16730 transitions. Word has length 639 [2022-07-13 12:44:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:05,239 INFO L495 AbstractCegarLoop]: Abstraction has 15157 states and 16730 transitions. [2022-07-13 12:44:05,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15157 states and 16730 transitions. [2022-07-13 12:44:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-07-13 12:44:05,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:44:05,254 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:44:05,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 12:44:05,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-13 12:44:05,465 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:44:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:44:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1717664100, now seen corresponding path program 1 times [2022-07-13 12:44:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:44:05,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779276543] [2022-07-13 12:44:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:44:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 876 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-07-13 12:44:05,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:44:05,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779276543] [2022-07-13 12:44:05,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779276543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:44:05,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:44:05,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:44:05,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604755517] [2022-07-13 12:44:05,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:44:05,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:44:05,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:05,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:44:05,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:44:05,723 INFO L87 Difference]: Start difference. First operand 15157 states and 16730 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:06,387 INFO L93 Difference]: Finished difference Result 32518 states and 35866 transitions. [2022-07-13 12:44:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:44:06,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 645 [2022-07-13 12:44:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:06,411 INFO L225 Difference]: With dead ends: 32518 [2022-07-13 12:44:06,411 INFO L226 Difference]: Without dead ends: 18285 [2022-07-13 12:44:06,423 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 [2022-07-13 12:44:06,424 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:06,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 114 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 12:44:06,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18285 states. [2022-07-13 12:44:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18285 to 16627. [2022-07-13 12:44:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16627 states, 16626 states have (on average 1.0974377481053772) internal successors, (18246), 16626 states have internal predecessors, (18246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16627 states to 16627 states and 18246 transitions. [2022-07-13 12:44:06,597 INFO L78 Accepts]: Start accepts. Automaton has 16627 states and 18246 transitions. Word has length 645 [2022-07-13 12:44:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:06,598 INFO L495 AbstractCegarLoop]: Abstraction has 16627 states and 18246 transitions. [2022-07-13 12:44:06,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 16627 states and 18246 transitions. [2022-07-13 12:44:06,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2022-07-13 12:44:06,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:44:06,616 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-07-13 12:44:06,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 12:44:06,617 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:44:06,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:44:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1198800803, now seen corresponding path program 1 times [2022-07-13 12:44:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:44:06,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502344678] [2022-07-13 12:44:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:06,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:44:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 1049 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-07-13 12:44:06,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:44:06,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502344678] [2022-07-13 12:44:06,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502344678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:44:06,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:44:06,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:44:06,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929290576] [2022-07-13 12:44:06,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:44:06,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:44:06,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:06,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:44:06,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:44:06,825 INFO L87 Difference]: Start difference. First operand 16627 states and 18246 transitions. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:07,743 INFO L93 Difference]: Finished difference Result 35101 states and 38541 transitions. [2022-07-13 12:44:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:44:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 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 680 [2022-07-13 12:44:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:07,764 INFO L225 Difference]: With dead ends: 35101 [2022-07-13 12:44:07,764 INFO L226 Difference]: Without dead ends: 19582 [2022-07-13 12:44:07,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:44:07,775 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 192 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:07,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 58 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 12:44:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19582 states. [2022-07-13 12:44:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19582 to 16627. [2022-07-13 12:44:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16627 states, 16626 states have (on average 1.0974377481053772) internal successors, (18246), 16626 states have internal predecessors, (18246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16627 states to 16627 states and 18246 transitions. [2022-07-13 12:44:07,943 INFO L78 Accepts]: Start accepts. Automaton has 16627 states and 18246 transitions. Word has length 680 [2022-07-13 12:44:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:07,943 INFO L495 AbstractCegarLoop]: Abstraction has 16627 states and 18246 transitions. [2022-07-13 12:44:07,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 16627 states and 18246 transitions. [2022-07-13 12:44:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2022-07-13 12:44:07,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:44:07,957 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:44:07,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 12:44:07,958 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:44:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:44:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1912494515, now seen corresponding path program 1 times [2022-07-13 12:44:07,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:44:07,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699206342] [2022-07-13 12:44:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:07,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:44:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 1034 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-07-13 12:44:08,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:44:08,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699206342] [2022-07-13 12:44:08,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699206342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:44:08,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:44:08,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:44:08,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036599123] [2022-07-13 12:44:08,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:44:08,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:44:08,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:44:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:44:08,200 INFO L87 Difference]: Start difference. First operand 16627 states and 18246 transitions. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:08,766 INFO L93 Difference]: Finished difference Result 32882 states and 36090 transitions. [2022-07-13 12:44:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:44:08,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 694 [2022-07-13 12:44:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:08,783 INFO L225 Difference]: With dead ends: 32882 [2022-07-13 12:44:08,783 INFO L226 Difference]: Without dead ends: 17179 [2022-07-13 12:44:08,793 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 [2022-07-13 12:44:08,794 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 103 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:08,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 134 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 12:44:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17179 states. [2022-07-13 12:44:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17179 to 15701. [2022-07-13 12:44:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15701 states, 15700 states have (on average 1.0945859872611465) internal successors, (17185), 15700 states have internal predecessors, (17185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15701 states to 15701 states and 17185 transitions. [2022-07-13 12:44:08,954 INFO L78 Accepts]: Start accepts. Automaton has 15701 states and 17185 transitions. Word has length 694 [2022-07-13 12:44:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:08,955 INFO L495 AbstractCegarLoop]: Abstraction has 15701 states and 17185 transitions. [2022-07-13 12:44:08,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand 15701 states and 17185 transitions. [2022-07-13 12:44:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-07-13 12:44:08,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:44:08,969 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-07-13 12:44:08,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 12:44:08,970 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:44:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:44:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 737170325, now seen corresponding path program 1 times [2022-07-13 12:44:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:44:08,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524688164] [2022-07-13 12:44:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:08,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:44:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 954 proven. 0 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-07-13 12:44:09,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:44:09,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524688164] [2022-07-13 12:44:09,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524688164] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:44:09,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:44:09,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:44:09,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144984244] [2022-07-13 12:44:09,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:44:09,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:44:09,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:44:09,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:44:09,204 INFO L87 Difference]: Start difference. First operand 15701 states and 17185 transitions. Second operand has 4 states, 4 states have (on average 115.75) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:10,247 INFO L93 Difference]: Finished difference Result 34722 states and 38039 transitions. [2022-07-13 12:44:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:44:10,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 725 [2022-07-13 12:44:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:10,265 INFO L225 Difference]: With dead ends: 34722 [2022-07-13 12:44:10,266 INFO L226 Difference]: Without dead ends: 19391 [2022-07-13 12:44:10,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:44:10,276 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 121 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:10,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 96 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 12:44:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19391 states. [2022-07-13 12:44:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19391 to 17732. [2022-07-13 12:44:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17732 states, 17731 states have (on average 1.0903502340533529) internal successors, (19333), 17731 states have internal predecessors, (19333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17732 states to 17732 states and 19333 transitions. [2022-07-13 12:44:10,537 INFO L78 Accepts]: Start accepts. Automaton has 17732 states and 19333 transitions. Word has length 725 [2022-07-13 12:44:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:10,538 INFO L495 AbstractCegarLoop]: Abstraction has 17732 states and 19333 transitions. [2022-07-13 12:44:10,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 17732 states and 19333 transitions. [2022-07-13 12:44:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2022-07-13 12:44:10,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:44:10,557 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:44:10,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 12:44:10,558 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:44:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:44:10,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1817314565, now seen corresponding path program 1 times [2022-07-13 12:44:10,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:44:10,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768640786] [2022-07-13 12:44:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:10,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:44:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1495 backedges. 903 proven. 0 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-07-13 12:44:10,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:44:10,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768640786] [2022-07-13 12:44:10,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768640786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:44:10,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:44:10,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:44:10,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983163935] [2022-07-13 12:44:10,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:44:10,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:44:10,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:10,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:44:10,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:44:10,765 INFO L87 Difference]: Start difference. First operand 17732 states and 19333 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:11,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:11,350 INFO L93 Difference]: Finished difference Result 35646 states and 38895 transitions. [2022-07-13 12:44:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:44:11,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 756 [2022-07-13 12:44:11,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:11,367 INFO L225 Difference]: With dead ends: 35646 [2022-07-13 12:44:11,367 INFO L226 Difference]: Without dead ends: 18654 [2022-07-13 12:44:11,376 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 [2022-07-13 12:44:11,377 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 195 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:11,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 338 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 12:44:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18654 states. [2022-07-13 12:44:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18654 to 14596. [2022-07-13 12:44:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14596 states, 14595 states have (on average 1.086125385405961) internal successors, (15852), 14595 states have internal predecessors, (15852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14596 states to 14596 states and 15852 transitions. [2022-07-13 12:44:11,535 INFO L78 Accepts]: Start accepts. Automaton has 14596 states and 15852 transitions. Word has length 756 [2022-07-13 12:44:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:11,536 INFO L495 AbstractCegarLoop]: Abstraction has 14596 states and 15852 transitions. [2022-07-13 12:44:11,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 14596 states and 15852 transitions. [2022-07-13 12:44:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 764 [2022-07-13 12:44:11,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:44:11,548 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:44:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 12:44:11,549 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:44:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:44:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1456791539, now seen corresponding path program 1 times [2022-07-13 12:44:11,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:44:11,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309791937] [2022-07-13 12:44:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:11,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:44:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 648 proven. 554 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-13 12:44:11,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:44:11,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309791937] [2022-07-13 12:44:11,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309791937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:44:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209305531] [2022-07-13 12:44:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:11,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:44:11,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:44:11,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 12:44:11,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 12:44:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:12,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 12:44:12,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:44:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-13 12:44:12,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:44:12,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209305531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:44:12,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:44:12,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-13 12:44:12,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093548508] [2022-07-13 12:44:12,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:44:12,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:44:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:44:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 12:44:12,348 INFO L87 Difference]: Start difference. First operand 14596 states and 15852 transitions. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:12,908 INFO L93 Difference]: Finished difference Result 29199 states and 31740 transitions. [2022-07-13 12:44:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:44:12,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 763 [2022-07-13 12:44:12,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:12,922 INFO L225 Difference]: With dead ends: 29199 [2022-07-13 12:44:12,922 INFO L226 Difference]: Without dead ends: 15159 [2022-07-13 12:44:12,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 12:44:12,931 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 103 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:12,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 327 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 12:44:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15159 states. [2022-07-13 12:44:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15159 to 14782. [2022-07-13 12:44:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14782 states, 14781 states have (on average 1.085041607469048) internal successors, (16038), 14781 states have internal predecessors, (16038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:13,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14782 states to 14782 states and 16038 transitions. [2022-07-13 12:44:13,098 INFO L78 Accepts]: Start accepts. Automaton has 14782 states and 16038 transitions. Word has length 763 [2022-07-13 12:44:13,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:13,098 INFO L495 AbstractCegarLoop]: Abstraction has 14782 states and 16038 transitions. [2022-07-13 12:44:13,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:13,099 INFO L276 IsEmpty]: Start isEmpty. Operand 14782 states and 16038 transitions. [2022-07-13 12:44:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2022-07-13 12:44:13,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:44:13,112 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:44:13,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 12:44:13,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:44:13,313 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:44:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:44:13,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1494290570, now seen corresponding path program 1 times [2022-07-13 12:44:13,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:44:13,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025917020] [2022-07-13 12:44:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:13,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:44:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 1317 proven. 0 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2022-07-13 12:44:13,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:44:13,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025917020] [2022-07-13 12:44:13,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025917020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:44:13,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:44:13,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 12:44:13,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165621451] [2022-07-13 12:44:13,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:44:13,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:44:13,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:13,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:44:13,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:44:13,617 INFO L87 Difference]: Start difference. First operand 14782 states and 16038 transitions. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:14,435 INFO L93 Difference]: Finished difference Result 29374 states and 31788 transitions. [2022-07-13 12:44:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:44:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 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 817 [2022-07-13 12:44:14,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:14,453 INFO L225 Difference]: With dead ends: 29374 [2022-07-13 12:44:14,453 INFO L226 Difference]: Without dead ends: 15148 [2022-07-13 12:44:14,461 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 [2022-07-13 12:44:14,462 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 174 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:14,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 52 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 12:44:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15148 states. [2022-07-13 12:44:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15148 to 12564. [2022-07-13 12:44:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12564 states, 12563 states have (on average 1.078962031361936) internal successors, (13555), 12563 states have internal predecessors, (13555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12564 states to 12564 states and 13555 transitions. [2022-07-13 12:44:14,621 INFO L78 Accepts]: Start accepts. Automaton has 12564 states and 13555 transitions. Word has length 817 [2022-07-13 12:44:14,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:14,622 INFO L495 AbstractCegarLoop]: Abstraction has 12564 states and 13555 transitions. [2022-07-13 12:44:14,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 12564 states and 13555 transitions. [2022-07-13 12:44:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 830 [2022-07-13 12:44:14,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:44:14,634 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 12:44:14,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-13 12:44:14,634 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:44:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:44:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1603139587, now seen corresponding path program 1 times [2022-07-13 12:44:14,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:44:14,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753053038] [2022-07-13 12:44:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:44:14,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:44:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:44:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1896 backedges. 1341 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-07-13 12:44:14,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:44:14,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753053038] [2022-07-13 12:44:14,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753053038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:44:14,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:44:14,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:44:14,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288531041] [2022-07-13 12:44:14,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:44:14,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:44:14,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:44:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:44:14,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:44:14,843 INFO L87 Difference]: Start difference. First operand 12564 states and 13555 transitions. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:44:15,351 INFO L93 Difference]: Finished difference Result 22362 states and 24134 transitions. [2022-07-13 12:44:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:44:15,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 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 829 [2022-07-13 12:44:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:44:15,352 INFO L225 Difference]: With dead ends: 22362 [2022-07-13 12:44:15,352 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 12:44:15,360 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 [2022-07-13 12:44:15,360 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 99 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 12:44:15,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 321 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 12:44:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 12:44:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 12:44:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 12:44:15,361 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 829 [2022-07-13 12:44:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:44:15,362 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 12:44:15,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:44:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 12:44:15,362 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 12:44:15,364 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 12:44:15,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 12:44:15,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.