./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label34.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label34.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 c727ce378f9c6151587faf5638863d5f3634ffe42c74bcfcd0e6318a1faa4f2e --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:20:38,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:20:38,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:20:38,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:20:38,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:20:38,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:20:38,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:20:38,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:20:38,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:20:38,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:20:38,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:20:38,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:20:38,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:20:38,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:20:38,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:20:38,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:20:38,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:20:38,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:20:38,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:20:38,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:20:38,253 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:20:38,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:20:38,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:20:38,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:20:38,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:20:38,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:20:38,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:20:38,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:20:38,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:20:38,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:20:38,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:20:38,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:20:38,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:20:38,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:20:38,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:20:38,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:20:38,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:20:38,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:20:38,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:20:38,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:20:38,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:20:38,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:20:38,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:20:38,305 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:20:38,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:20:38,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:20:38,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:20:38,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:20:38,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:20:38,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:20:38,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:20:38,309 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:20:38,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:20:38,310 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:20:38,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:20:38,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:20:38,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:20:38,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:20:38,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:20:38,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:20:38,311 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:20:38,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:20:38,311 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:20:38,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:20:38,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:20:38,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:20:38,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:20:38,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:20:38,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:20:38,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:20:38,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:20:38,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:20:38,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:20:38,314 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:20:38,314 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:20:38,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:20:38,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c727ce378f9c6151587faf5638863d5f3634ffe42c74bcfcd0e6318a1faa4f2e [2022-07-19 12:20:38,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:20:38,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:20:38,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:20:38,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:20:38,573 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:20:38,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2022-07-19 12:20:38,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b27aceb0/49124f53c2eb491aa3ebec878e37c0f6/FLAGf096cdf6f [2022-07-19 12:20:39,356 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:20:39,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2022-07-19 12:20:39,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b27aceb0/49124f53c2eb491aa3ebec878e37c0f6/FLAGf096cdf6f [2022-07-19 12:20:39,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b27aceb0/49124f53c2eb491aa3ebec878e37c0f6 [2022-07-19 12:20:39,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:20:39,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:20:39,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:20:39,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:20:39,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:20:39,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:20:39" (1/1) ... [2022-07-19 12:20:39,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d2de12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:39, skipping insertion in model container [2022-07-19 12:20:39,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:20:39" (1/1) ... [2022-07-19 12:20:39,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:20:39,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:20:39,813 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/Problem13_label34.c[7959,7972] [2022-07-19 12:20:40,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:20:40,720 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:20:40,757 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/Problem13_label34.c[7959,7972] [2022-07-19 12:20:41,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:20:41,232 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:20:41,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41 WrapperNode [2022-07-19 12:20:41,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:20:41,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:20:41,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:20:41,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:20:41,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:41,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:42,021 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-19 12:20:42,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:20:42,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:20:42,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:20:42,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:20:42,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:42,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:42,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:42,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:42,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:42,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:42,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:42,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:20:42,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:20:42,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:20:42,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:20:42,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (1/1) ... [2022-07-19 12:20:42,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:20:42,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:20:42,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 12:20:42,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 12:20:42,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:20:42,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:20:42,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:20:42,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:20:42,783 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:20:42,785 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:20:47,434 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:20:47,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:20:47,455 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:20:47,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:20:47 BoogieIcfgContainer [2022-07-19 12:20:47,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:20:47,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:20:47,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:20:47,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:20:47,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:20:39" (1/3) ... [2022-07-19 12:20:47,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a246ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:20:47, skipping insertion in model container [2022-07-19 12:20:47,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:20:41" (2/3) ... [2022-07-19 12:20:47,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a246ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:20:47, skipping insertion in model container [2022-07-19 12:20:47,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:20:47" (3/3) ... [2022-07-19 12:20:47,466 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label34.c [2022-07-19 12:20:47,481 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:20:47,481 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:20:47,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:20:47,629 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@6eaea4a9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5540d4c0 [2022-07-19 12:20:47,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:20:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 12:20:47,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:47,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:47,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2158734, now seen corresponding path program 1 times [2022-07-19 12:20:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:47,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826587427] [2022-07-19 12:20:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:47,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:47,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:47,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826587427] [2022-07-19 12:20:47,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826587427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:47,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:47,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:20:47,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368595610] [2022-07-19 12:20:47,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:47,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:47,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:48,017 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:52,138 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2022-07-19 12:20:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:52,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2022-07-19 12:20:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:52,165 INFO L225 Difference]: With dead ends: 3082 [2022-07-19 12:20:52,165 INFO L226 Difference]: Without dead ends: 1899 [2022-07-19 12:20:52,174 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 [2022-07-19 12:20:52,177 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 983 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:52,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-19 12:20:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-07-19 12:20:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2022-07-19 12:20:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2022-07-19 12:20:52,295 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 56 [2022-07-19 12:20:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:52,296 INFO L495 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2022-07-19 12:20:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2022-07-19 12:20:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-19 12:20:52,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:52,304 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, 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] [2022-07-19 12:20:52,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:20:52,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2024645466, now seen corresponding path program 1 times [2022-07-19 12:20:52,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:52,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688359354] [2022-07-19 12:20:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:52,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:52,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:52,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688359354] [2022-07-19 12:20:52,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688359354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:52,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:52,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:20:52,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75046944] [2022-07-19 12:20:52,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:52,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:52,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:52,493 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:56,048 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2022-07-19 12:20:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:56,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-07-19 12:20:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:56,065 INFO L225 Difference]: With dead ends: 5384 [2022-07-19 12:20:56,066 INFO L226 Difference]: Without dead ends: 3492 [2022-07-19 12:20:56,070 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 [2022-07-19 12:20:56,071 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 922 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:56,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1013 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-19 12:20:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2022-07-19 12:20:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2022-07-19 12:20:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 1.5383954154727795) internal successors, (5369), 3490 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2022-07-19 12:20:56,137 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 121 [2022-07-19 12:20:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:56,138 INFO L495 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2022-07-19 12:20:56,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2022-07-19 12:20:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-19 12:20:56,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:56,141 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, 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] [2022-07-19 12:20:56,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:20:56,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:56,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1368710357, now seen corresponding path program 1 times [2022-07-19 12:20:56,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:56,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658281818] [2022-07-19 12:20:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:56,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:56,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658281818] [2022-07-19 12:20:56,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658281818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:56,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:56,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:20:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691779692] [2022-07-19 12:20:56,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:56,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:56,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:56,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:56,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:56,265 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:59,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:59,286 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2022-07-19 12:20:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:59,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2022-07-19 12:20:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:59,315 INFO L225 Difference]: With dead ends: 10169 [2022-07-19 12:20:59,315 INFO L226 Difference]: Without dead ends: 6680 [2022-07-19 12:20:59,323 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 [2022-07-19 12:20:59,324 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 977 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:59,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 847 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:20:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2022-07-19 12:20:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2022-07-19 12:20:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6669 states, 6668 states have (on average 1.375224955008998) internal successors, (9170), 6668 states have internal predecessors, (9170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2022-07-19 12:20:59,470 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 123 [2022-07-19 12:20:59,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:59,471 INFO L495 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2022-07-19 12:20:59,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2022-07-19 12:20:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-19 12:20:59,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:59,475 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, 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] [2022-07-19 12:20:59,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:20:59,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1275120761, now seen corresponding path program 1 times [2022-07-19 12:20:59,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:59,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031138131] [2022-07-19 12:20:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:59,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:59,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031138131] [2022-07-19 12:20:59,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031138131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:59,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:59,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:20:59,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394977600] [2022-07-19 12:20:59,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:59,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:59,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:59,702 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:02,344 INFO L93 Difference]: Finished difference Result 14123 states and 19185 transitions. [2022-07-19 12:21:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 167 [2022-07-19 12:21:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:02,370 INFO L225 Difference]: With dead ends: 14123 [2022-07-19 12:21:02,370 INFO L226 Difference]: Without dead ends: 7456 [2022-07-19 12:21:02,381 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 [2022-07-19 12:21:02,382 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:02,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1215 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:21:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-07-19 12:21:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 7456. [2022-07-19 12:21:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7456 states, 7455 states have (on average 1.3362843729040912) internal successors, (9962), 7455 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7456 states to 7456 states and 9962 transitions. [2022-07-19 12:21:02,515 INFO L78 Accepts]: Start accepts. Automaton has 7456 states and 9962 transitions. Word has length 167 [2022-07-19 12:21:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:02,516 INFO L495 AbstractCegarLoop]: Abstraction has 7456 states and 9962 transitions. [2022-07-19 12:21:02,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:02,517 INFO L276 IsEmpty]: Start isEmpty. Operand 7456 states and 9962 transitions. [2022-07-19 12:21:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-19 12:21:02,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:02,519 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, 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] [2022-07-19 12:21:02,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:21:02,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:02,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1023420253, now seen corresponding path program 1 times [2022-07-19 12:21:02,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:02,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707637425] [2022-07-19 12:21:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:02,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:21:02,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:02,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707637425] [2022-07-19 12:21:02,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707637425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:02,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:02,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:02,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779839793] [2022-07-19 12:21:02,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:02,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:21:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:21:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:21:02,643 INFO L87 Difference]: Start difference. First operand 7456 states and 9962 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:09,142 INFO L93 Difference]: Finished difference Result 26116 states and 35959 transitions. [2022-07-19 12:21:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:21:09,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 181 [2022-07-19 12:21:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:09,192 INFO L225 Difference]: With dead ends: 26116 [2022-07-19 12:21:09,192 INFO L226 Difference]: Without dead ends: 19449 [2022-07-19 12:21:09,204 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 [2022-07-19 12:21:09,206 INFO L413 NwaCegarLoop]: 899 mSDtfsCounter, 1630 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 7397 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1630 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 8037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 7397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:09,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1630 Valid, 1187 Invalid, 8037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 7397 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-07-19 12:21:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19449 states. [2022-07-19 12:21:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19449 to 19303. [2022-07-19 12:21:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19303 states, 19302 states have (on average 1.2778468552481608) internal successors, (24665), 19302 states have internal predecessors, (24665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19303 states to 19303 states and 24665 transitions. [2022-07-19 12:21:09,557 INFO L78 Accepts]: Start accepts. Automaton has 19303 states and 24665 transitions. Word has length 181 [2022-07-19 12:21:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:09,558 INFO L495 AbstractCegarLoop]: Abstraction has 19303 states and 24665 transitions. [2022-07-19 12:21:09,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 19303 states and 24665 transitions. [2022-07-19 12:21:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-07-19 12:21:09,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:09,564 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:09,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:21:09,565 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1740885801, now seen corresponding path program 1 times [2022-07-19 12:21:09,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:09,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890233330] [2022-07-19 12:21:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:09,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-19 12:21:09,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:09,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890233330] [2022-07-19 12:21:09,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890233330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:09,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:09,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:21:09,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795916289] [2022-07-19 12:21:09,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:09,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:09,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:09,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:09,778 INFO L87 Difference]: Start difference. First operand 19303 states and 24665 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:12,712 INFO L93 Difference]: Finished difference Result 33881 states and 44171 transitions. [2022-07-19 12:21:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:12,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 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 268 [2022-07-19 12:21:12,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:12,743 INFO L225 Difference]: With dead ends: 33881 [2022-07-19 12:21:12,743 INFO L226 Difference]: Without dead ends: 19312 [2022-07-19 12:21:12,764 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 [2022-07-19 12:21:12,765 INFO L413 NwaCegarLoop]: 1028 mSDtfsCounter, 728 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:12,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1212 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:21:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19312 states. [2022-07-19 12:21:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19312 to 19303. [2022-07-19 12:21:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19303 states, 19302 states have (on average 1.2765516526784788) internal successors, (24640), 19302 states have internal predecessors, (24640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19303 states to 19303 states and 24640 transitions. [2022-07-19 12:21:13,101 INFO L78 Accepts]: Start accepts. Automaton has 19303 states and 24640 transitions. Word has length 268 [2022-07-19 12:21:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:13,102 INFO L495 AbstractCegarLoop]: Abstraction has 19303 states and 24640 transitions. [2022-07-19 12:21:13,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 19303 states and 24640 transitions. [2022-07-19 12:21:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-19 12:21:13,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:13,106 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:13,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:21:13,107 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:13,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2013422099, now seen corresponding path program 1 times [2022-07-19 12:21:13,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:13,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983341218] [2022-07-19 12:21:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:13,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:21:13,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983341218] [2022-07-19 12:21:13,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983341218] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:13,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:13,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:13,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251548722] [2022-07-19 12:21:13,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:13,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:13,227 INFO L87 Difference]: Start difference. First operand 19303 states and 24640 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:16,401 INFO L93 Difference]: Finished difference Result 51975 states and 67214 transitions. [2022-07-19 12:21:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 270 [2022-07-19 12:21:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:16,469 INFO L225 Difference]: With dead ends: 51975 [2022-07-19 12:21:16,470 INFO L226 Difference]: Without dead ends: 32674 [2022-07-19 12:21:16,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:16,502 INFO L413 NwaCegarLoop]: 1854 mSDtfsCounter, 842 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:16,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1994 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:21:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32674 states. [2022-07-19 12:21:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32674 to 31090. [2022-07-19 12:21:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31090 states, 31089 states have (on average 1.2295667277815305) internal successors, (38226), 31089 states have internal predecessors, (38226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31090 states to 31090 states and 38226 transitions. [2022-07-19 12:21:16,900 INFO L78 Accepts]: Start accepts. Automaton has 31090 states and 38226 transitions. Word has length 270 [2022-07-19 12:21:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:16,900 INFO L495 AbstractCegarLoop]: Abstraction has 31090 states and 38226 transitions. [2022-07-19 12:21:16,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 31090 states and 38226 transitions. [2022-07-19 12:21:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-07-19 12:21:16,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:16,906 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, 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, 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] [2022-07-19 12:21:16,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:21:16,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:16,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:16,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1544530878, now seen corresponding path program 1 times [2022-07-19 12:21:16,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:16,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604989436] [2022-07-19 12:21:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:16,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 12:21:17,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604989436] [2022-07-19 12:21:17,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604989436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:17,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:17,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:17,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510762357] [2022-07-19 12:21:17,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:17,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:17,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:17,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:17,004 INFO L87 Difference]: Start difference. First operand 31090 states and 38226 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:20,359 INFO L93 Difference]: Finished difference Result 85799 states and 106634 transitions. [2022-07-19 12:21:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 292 [2022-07-19 12:21:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:20,441 INFO L225 Difference]: With dead ends: 85799 [2022-07-19 12:21:20,441 INFO L226 Difference]: Without dead ends: 55498 [2022-07-19 12:21:20,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:20,474 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 883 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:20,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 902 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:21:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55498 states. [2022-07-19 12:21:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55498 to 54701. [2022-07-19 12:21:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54701 states, 54700 states have (on average 1.186764168190128) internal successors, (64916), 54700 states have internal predecessors, (64916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54701 states to 54701 states and 64916 transitions. [2022-07-19 12:21:21,100 INFO L78 Accepts]: Start accepts. Automaton has 54701 states and 64916 transitions. Word has length 292 [2022-07-19 12:21:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:21,101 INFO L495 AbstractCegarLoop]: Abstraction has 54701 states and 64916 transitions. [2022-07-19 12:21:21,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 54701 states and 64916 transitions. [2022-07-19 12:21:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-07-19 12:21:21,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:21,107 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:21,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:21:21,107 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:21,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1243297026, now seen corresponding path program 1 times [2022-07-19 12:21:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:21,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019672088] [2022-07-19 12:21:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:21,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-19 12:21:21,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:21,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019672088] [2022-07-19 12:21:21,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019672088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:21,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:21,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:21,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982100656] [2022-07-19 12:21:21,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:21,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:21,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:21,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:21,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:21,243 INFO L87 Difference]: Start difference. First operand 54701 states and 64916 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:24,857 INFO L93 Difference]: Finished difference Result 129084 states and 155214 transitions. [2022-07-19 12:21:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:24,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 347 [2022-07-19 12:21:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:24,969 INFO L225 Difference]: With dead ends: 129084 [2022-07-19 12:21:24,969 INFO L226 Difference]: Without dead ends: 75172 [2022-07-19 12:21:25,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:25,014 INFO L413 NwaCegarLoop]: 1815 mSDtfsCounter, 805 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:25,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 1959 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2557 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 12:21:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75172 states. [2022-07-19 12:21:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75172 to 74380. [2022-07-19 12:21:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74380 states, 74379 states have (on average 1.1514271501364632) internal successors, (85642), 74379 states have internal predecessors, (85642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74380 states to 74380 states and 85642 transitions. [2022-07-19 12:21:25,816 INFO L78 Accepts]: Start accepts. Automaton has 74380 states and 85642 transitions. Word has length 347 [2022-07-19 12:21:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:25,817 INFO L495 AbstractCegarLoop]: Abstraction has 74380 states and 85642 transitions. [2022-07-19 12:21:25,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 74380 states and 85642 transitions. [2022-07-19 12:21:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-07-19 12:21:25,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:25,824 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, 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, 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] [2022-07-19 12:21:25,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:21:25,824 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:25,825 INFO L85 PathProgramCache]: Analyzing trace with hash 652420715, now seen corresponding path program 1 times [2022-07-19 12:21:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:25,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306920126] [2022-07-19 12:21:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:25,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 236 proven. 113 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 12:21:26,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:26,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306920126] [2022-07-19 12:21:26,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306920126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:21:26,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244211734] [2022-07-19 12:21:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:26,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:21:26,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:21:26,737 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) [2022-07-19 12:21:26,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:21:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:26,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:21:26,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:21:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-19 12:21:27,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:21:27,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244211734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:27,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:21:27,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:21:27,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913687637] [2022-07-19 12:21:27,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:27,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:27,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:27,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:27,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:21:27,067 INFO L87 Difference]: Start difference. First operand 74380 states and 85642 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:30,403 INFO L93 Difference]: Finished difference Result 147962 states and 170482 transitions. [2022-07-19 12:21:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 362 [2022-07-19 12:21:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:30,519 INFO L225 Difference]: With dead ends: 147962 [2022-07-19 12:21:30,519 INFO L226 Difference]: Without dead ends: 74371 [2022-07-19 12:21:30,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:21:30,546 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 1078 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:30,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 817 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:21:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74371 states. [2022-07-19 12:21:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74371 to 74370. [2022-07-19 12:21:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74370 states, 74369 states have (on average 1.1130847530557086) internal successors, (82779), 74369 states have internal predecessors, (82779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74370 states to 74370 states and 82779 transitions. [2022-07-19 12:21:31,569 INFO L78 Accepts]: Start accepts. Automaton has 74370 states and 82779 transitions. Word has length 362 [2022-07-19 12:21:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:31,570 INFO L495 AbstractCegarLoop]: Abstraction has 74370 states and 82779 transitions. [2022-07-19 12:21:31,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:31,571 INFO L276 IsEmpty]: Start isEmpty. Operand 74370 states and 82779 transitions. [2022-07-19 12:21:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-07-19 12:21:31,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:31,592 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, 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, 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] [2022-07-19 12:21:31,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 12:21:31,823 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,SelfDestructingSolverStorable9 [2022-07-19 12:21:31,824 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:31,825 INFO L85 PathProgramCache]: Analyzing trace with hash 315445644, now seen corresponding path program 1 times [2022-07-19 12:21:31,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:31,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107822338] [2022-07-19 12:21:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:31,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2022-07-19 12:21:32,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:32,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107822338] [2022-07-19 12:21:32,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107822338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:32,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:32,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:32,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69018786] [2022-07-19 12:21:32,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:32,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:32,080 INFO L87 Difference]: Start difference. First operand 74370 states and 82779 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:35,165 INFO L93 Difference]: Finished difference Result 145587 states and 162051 transitions. [2022-07-19 12:21:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:35,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 381 [2022-07-19 12:21:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:35,266 INFO L225 Difference]: With dead ends: 145587 [2022-07-19 12:21:35,266 INFO L226 Difference]: Without dead ends: 72006 [2022-07-19 12:21:35,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:35,286 INFO L413 NwaCegarLoop]: 1342 mSDtfsCounter, 1146 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:35,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 1421 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:21:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72006 states. [2022-07-19 12:21:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72006 to 72005. [2022-07-19 12:21:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72005 states, 72004 states have (on average 1.0866618521193268) internal successors, (78244), 72004 states have internal predecessors, (78244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72005 states to 72005 states and 78244 transitions. [2022-07-19 12:21:36,204 INFO L78 Accepts]: Start accepts. Automaton has 72005 states and 78244 transitions. Word has length 381 [2022-07-19 12:21:36,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:36,205 INFO L495 AbstractCegarLoop]: Abstraction has 72005 states and 78244 transitions. [2022-07-19 12:21:36,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 72005 states and 78244 transitions. [2022-07-19 12:21:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-07-19 12:21:36,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:36,211 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:36,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 12:21:36,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:36,212 INFO L85 PathProgramCache]: Analyzing trace with hash -718507191, now seen corresponding path program 1 times [2022-07-19 12:21:36,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036465913] [2022-07-19 12:21:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:36,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-19 12:21:36,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:36,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036465913] [2022-07-19 12:21:36,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036465913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:36,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:36,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259373919] [2022-07-19 12:21:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:36,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:21:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:21:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:21:36,346 INFO L87 Difference]: Start difference. First operand 72005 states and 78244 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:42,922 INFO L93 Difference]: Finished difference Result 195375 states and 213138 transitions. [2022-07-19 12:21:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:21:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 404 [2022-07-19 12:21:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:43,073 INFO L225 Difference]: With dead ends: 195375 [2022-07-19 12:21:43,073 INFO L226 Difference]: Without dead ends: 124159 [2022-07-19 12:21:43,112 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 [2022-07-19 12:21:43,113 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 1709 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 6634 mSolverCounterSat, 1038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 7672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1038 IncrementalHoareTripleChecker+Valid, 6634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:43,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 795 Invalid, 7672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1038 Valid, 6634 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-07-19 12:21:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124159 states. [2022-07-19 12:21:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124159 to 121667. [2022-07-19 12:21:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121667 states, 121666 states have (on average 1.084608682787303) internal successors, (131960), 121666 states have internal predecessors, (131960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121667 states to 121667 states and 131960 transitions. [2022-07-19 12:21:44,766 INFO L78 Accepts]: Start accepts. Automaton has 121667 states and 131960 transitions. Word has length 404 [2022-07-19 12:21:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:44,767 INFO L495 AbstractCegarLoop]: Abstraction has 121667 states and 131960 transitions. [2022-07-19 12:21:44,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 121667 states and 131960 transitions. [2022-07-19 12:21:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-07-19 12:21:44,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:44,773 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:44,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 12:21:44,774 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2122716563, now seen corresponding path program 1 times [2022-07-19 12:21:44,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:44,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301060169] [2022-07-19 12:21:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-19 12:21:44,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301060169] [2022-07-19 12:21:44,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301060169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:44,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:44,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899844232] [2022-07-19 12:21:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:44,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:44,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:44,957 INFO L87 Difference]: Start difference. First operand 121667 states and 131960 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) [2022-07-19 12:21:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:48,572 INFO L93 Difference]: Finished difference Result 274840 states and 297848 transitions. [2022-07-19 12:21:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:48,573 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 437 [2022-07-19 12:21:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:48,801 INFO L225 Difference]: With dead ends: 274840 [2022-07-19 12:21:48,801 INFO L226 Difference]: Without dead ends: 153962 [2022-07-19 12:21:48,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:48,872 INFO L413 NwaCegarLoop]: 997 mSDtfsCounter, 795 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:48,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 1138 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:21:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153962 states. [2022-07-19 12:21:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153962 to 150001. [2022-07-19 12:21:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150001 states, 150000 states have (on average 1.0774533333333334) internal successors, (161618), 150000 states have internal predecessors, (161618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150001 states to 150001 states and 161618 transitions. [2022-07-19 12:21:50,835 INFO L78 Accepts]: Start accepts. Automaton has 150001 states and 161618 transitions. Word has length 437 [2022-07-19 12:21:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:50,836 INFO L495 AbstractCegarLoop]: Abstraction has 150001 states and 161618 transitions. [2022-07-19 12:21:50,836 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) [2022-07-19 12:21:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 150001 states and 161618 transitions. [2022-07-19 12:21:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-07-19 12:21:50,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:50,843 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:50,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:21:50,843 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:50,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1901999821, now seen corresponding path program 1 times [2022-07-19 12:21:50,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:50,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114605905] [2022-07-19 12:21:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:50,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 405 proven. 113 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-19 12:21:51,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114605905] [2022-07-19 12:21:51,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114605905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:21:51,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339801699] [2022-07-19 12:21:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:51,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:21:51,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:21:51,440 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) [2022-07-19 12:21:51,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:21:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:51,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:21:51,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:21:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-07-19 12:21:51,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:21:51,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339801699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:51,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:21:51,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:21:51,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792986063] [2022-07-19 12:21:51,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:51,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:51,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:51,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:51,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:21:51,704 INFO L87 Difference]: Start difference. First operand 150001 states and 161618 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:55,718 INFO L93 Difference]: Finished difference Result 331486 states and 359581 transitions. [2022-07-19 12:21:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 [2022-07-19 12:21:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:56,214 INFO L225 Difference]: With dead ends: 331486 [2022-07-19 12:21:56,215 INFO L226 Difference]: Without dead ends: 182274 [2022-07-19 12:21:56,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:21:56,293 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 930 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:56,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 889 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [936 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-19 12:21:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182274 states. [2022-07-19 12:21:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182274 to 180680. [2022-07-19 12:21:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180680 states, 180679 states have (on average 1.0821124757166023) internal successors, (195515), 180679 states have internal predecessors, (195515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180680 states to 180680 states and 195515 transitions. [2022-07-19 12:21:58,433 INFO L78 Accepts]: Start accepts. Automaton has 180680 states and 195515 transitions. Word has length 447 [2022-07-19 12:21:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:58,433 INFO L495 AbstractCegarLoop]: Abstraction has 180680 states and 195515 transitions. [2022-07-19 12:21:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 180680 states and 195515 transitions. [2022-07-19 12:21:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-07-19 12:21:58,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:58,449 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:58,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:21:58,649 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,SelfDestructingSolverStorable13 [2022-07-19 12:21:58,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:58,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:58,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1149099589, now seen corresponding path program 1 times [2022-07-19 12:21:58,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:58,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020897792] [2022-07-19 12:21:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:58,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-19 12:21:59,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:59,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020897792] [2022-07-19 12:21:59,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020897792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:59,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:59,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:59,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951236954] [2022-07-19 12:21:59,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:59,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:59,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:59,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:59,284 INFO L87 Difference]: Start difference. First operand 180680 states and 195515 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:03,058 INFO L93 Difference]: Finished difference Result 362149 states and 391828 transitions. [2022-07-19 12:22:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 516 [2022-07-19 12:22:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:03,289 INFO L225 Difference]: With dead ends: 362149 [2022-07-19 12:22:03,289 INFO L226 Difference]: Without dead ends: 182258 [2022-07-19 12:22:03,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:03,359 INFO L413 NwaCegarLoop]: 1384 mSDtfsCounter, 835 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:03,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 1469 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:22:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182258 states. [2022-07-19 12:22:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182258 to 180669. [2022-07-19 12:22:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180669 states, 180668 states have (on average 1.0637190869440079) internal successors, (192180), 180668 states have internal predecessors, (192180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180669 states to 180669 states and 192180 transitions. [2022-07-19 12:22:06,197 INFO L78 Accepts]: Start accepts. Automaton has 180669 states and 192180 transitions. Word has length 516 [2022-07-19 12:22:06,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:06,197 INFO L495 AbstractCegarLoop]: Abstraction has 180669 states and 192180 transitions. [2022-07-19 12:22:06,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:06,198 INFO L276 IsEmpty]: Start isEmpty. Operand 180669 states and 192180 transitions. [2022-07-19 12:22:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-07-19 12:22:06,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:06,216 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, 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, 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, 1] [2022-07-19 12:22:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:22:06,217 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash 582012110, now seen corresponding path program 1 times [2022-07-19 12:22:06,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:06,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085876396] [2022-07-19 12:22:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 345 proven. 113 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 12:22:06,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085876396] [2022-07-19 12:22:06,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085876396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:22:06,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600289327] [2022-07-19 12:22:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:06,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:22:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:22:06,533 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) [2022-07-19 12:22:06,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:22:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:06,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:22:06,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:22:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-19 12:22:06,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:22:06,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600289327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:06,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:22:06,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:22:06,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427795838] [2022-07-19 12:22:06,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:06,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:06,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:06,954 INFO L87 Difference]: Start difference. First operand 180669 states and 192180 transitions. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:10,774 INFO L93 Difference]: Finished difference Result 355016 states and 378663 transitions. [2022-07-19 12:22:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:10,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 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 528 [2022-07-19 12:22:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:11,409 INFO L225 Difference]: With dead ends: 355016 [2022-07-19 12:22:11,409 INFO L226 Difference]: Without dead ends: 191669 [2022-07-19 12:22:11,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:11,547 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1092 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 3067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:11,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1092 Valid, 389 Invalid, 3067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:22:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191669 states. [2022-07-19 12:22:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191669 to 191669. [2022-07-19 12:22:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191669 states, 191668 states have (on average 1.0599891479015797) internal successors, (203166), 191668 states have internal predecessors, (203166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191669 states to 191669 states and 203166 transitions. [2022-07-19 12:22:14,277 INFO L78 Accepts]: Start accepts. Automaton has 191669 states and 203166 transitions. Word has length 528 [2022-07-19 12:22:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:14,277 INFO L495 AbstractCegarLoop]: Abstraction has 191669 states and 203166 transitions. [2022-07-19 12:22:14,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 191669 states and 203166 transitions. [2022-07-19 12:22:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-07-19 12:22:14,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:14,297 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:14,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:22:14,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:22:14,506 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1539402955, now seen corresponding path program 1 times [2022-07-19 12:22:14,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:14,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642518329] [2022-07-19 12:22:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:14,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 514 proven. 113 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-19 12:22:14,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:14,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642518329] [2022-07-19 12:22:14,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642518329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:22:14,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536648161] [2022-07-19 12:22:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:14,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:22:14,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:22:14,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:22:14,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 12:22:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:22:14,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:22:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 538 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-19 12:22:15,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:22:15,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536648161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:15,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:22:15,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:22:15,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557960675] [2022-07-19 12:22:15,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:15,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:15,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:15,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:15,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:15,140 INFO L87 Difference]: Start difference. First operand 191669 states and 203166 transitions. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:19,280 INFO L93 Difference]: Finished difference Result 364440 states and 386887 transitions. [2022-07-19 12:22:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 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 554 [2022-07-19 12:22:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:19,590 INFO L225 Difference]: With dead ends: 364440 [2022-07-19 12:22:19,590 INFO L226 Difference]: Without dead ends: 190093 [2022-07-19 12:22:19,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:19,678 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 922 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:19,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 469 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:22:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190093 states. [2022-07-19 12:22:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190093 to 188510. [2022-07-19 12:22:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188510 states, 188509 states have (on average 1.0563103087916226) internal successors, (199124), 188509 states have internal predecessors, (199124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188510 states to 188510 states and 199124 transitions. [2022-07-19 12:22:22,313 INFO L78 Accepts]: Start accepts. Automaton has 188510 states and 199124 transitions. Word has length 554 [2022-07-19 12:22:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:22,314 INFO L495 AbstractCegarLoop]: Abstraction has 188510 states and 199124 transitions. [2022-07-19 12:22:22,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 188510 states and 199124 transitions. [2022-07-19 12:22:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2022-07-19 12:22:22,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:22,335 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:22,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 12:22:22,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 12:22:22,537 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:22,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2028217604, now seen corresponding path program 1 times [2022-07-19 12:22:22,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:22,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625627557] [2022-07-19 12:22:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:22,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 519 proven. 110 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-07-19 12:22:22,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:22,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625627557] [2022-07-19 12:22:22,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625627557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:22:22,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105982907] [2022-07-19 12:22:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:22,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:22:22,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:22:22,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:22:22,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 12:22:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:22,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:22:22,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:22:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2022-07-19 12:22:22,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:22:22,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105982907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:22,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:22:22,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-19 12:22:22,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595430335] [2022-07-19 12:22:22,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:23,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:23,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:22:23,001 INFO L87 Difference]: Start difference. First operand 188510 states and 199124 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)