./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/Problem03_label03.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 270b49fc6fbf3a6d565e1c23dc80c7cece24e766c52320c8c625102e15c9685f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:29:27,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:29:27,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:29:27,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:29:27,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:29:27,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:29:27,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:29:27,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:29:27,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:29:27,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:29:27,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:29:27,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:29:27,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:29:27,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:29:27,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:29:27,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:29:27,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:29:27,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:29:27,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:29:27,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:29:27,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:29:27,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:29:27,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:29:27,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:29:27,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:29:27,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:29:27,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:29:27,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:29:27,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:29:27,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:29:27,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:29:27,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:29:27,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:29:27,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:29:27,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:29:27,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:29:27,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:29:27,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:29:27,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:29:27,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:29:27,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:29:27,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:29:27,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:29:27,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:29:27,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:29:27,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:29:27,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:29:27,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:29:27,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:29:27,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:29:27,337 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:29:27,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:29:27,338 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:29:27,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:29:27,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:29:27,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:29:27,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:29:27,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:29:27,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:29:27,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:29:27,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:29:27,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:29:27,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:29:27,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:29:27,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:29:27,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:29:27,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:29:27,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:29:27,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:29:27,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:29:27,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:29:27,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:29:27,341 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:29:27,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:29:27,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:29:27,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:29:27,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 270b49fc6fbf3a6d565e1c23dc80c7cece24e766c52320c8c625102e15c9685f [2021-12-17 03:29:27,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:29:27,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:29:27,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:29:27,593 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:29:27,603 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:29:27,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label03.c [2021-12-17 03:29:27,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84bc55fc/966cd8ca537b4ff3a76d4f5b56c68e41/FLAGd3ed33d63 [2021-12-17 03:29:28,114 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:29:28,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label03.c [2021-12-17 03:29:28,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84bc55fc/966cd8ca537b4ff3a76d4f5b56c68e41/FLAGd3ed33d63 [2021-12-17 03:29:28,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84bc55fc/966cd8ca537b4ff3a76d4f5b56c68e41 [2021-12-17 03:29:28,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:29:28,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:29:28,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:29:28,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:29:28,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:29:28,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:29:28" (1/1) ... [2021-12-17 03:29:28,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc93bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:28, skipping insertion in model container [2021-12-17 03:29:28,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:29:28" (1/1) ... [2021-12-17 03:29:28,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:29:28,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:29:28,850 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/Problem03_label03.c[56355,56368] [2021-12-17 03:29:28,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:29:28,895 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:29:29,090 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/Problem03_label03.c[56355,56368] [2021-12-17 03:29:29,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:29:29,121 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:29:29,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29 WrapperNode [2021-12-17 03:29:29,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:29:29,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:29:29,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:29:29,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:29:29,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,225 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-17 03:29:29,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:29:29,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:29:29,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:29:29,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:29:29,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:29:29,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:29:29,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:29:29,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:29:29,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (1/1) ... [2021-12-17 03:29:29,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:29:29,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:29,329 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) [2021-12-17 03:29:29,347 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 [2021-12-17 03:29:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:29:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:29:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:29:29,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:29:29,424 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:29:29,425 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:29:30,600 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:29:30,606 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:29:30,606 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:29:30,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:29:30 BoogieIcfgContainer [2021-12-17 03:29:30,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:29:30,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:29:30,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:29:30,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:29:30,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:29:28" (1/3) ... [2021-12-17 03:29:30,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ed6494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:29:30, skipping insertion in model container [2021-12-17 03:29:30,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:29" (2/3) ... [2021-12-17 03:29:30,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ed6494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:29:30, skipping insertion in model container [2021-12-17 03:29:30,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:29:30" (3/3) ... [2021-12-17 03:29:30,613 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label03.c [2021-12-17 03:29:30,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:29:30,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:29:30,644 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:29:30,649 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:29:30,649 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:29:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 03:29:30,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:30,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:30,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash 303295378, now seen corresponding path program 1 times [2021-12-17 03:29:30,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:30,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425762394] [2021-12-17 03:29:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:30,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:31,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:31,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425762394] [2021-12-17 03:29:31,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425762394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:31,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:31,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:31,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499933237] [2021-12-17 03:29:31,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:31,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:31,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:31,075 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:31,850 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2021-12-17 03:29:31,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:31,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-12-17 03:29:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:31,861 INFO L225 Difference]: With dead ends: 836 [2021-12-17 03:29:31,861 INFO L226 Difference]: Without dead ends: 457 [2021-12-17 03:29:31,864 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:31,866 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 119 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:31,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:29:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-17 03:29:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2021-12-17 03:29:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2021-12-17 03:29:31,905 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 164 [2021-12-17 03:29:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:31,906 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2021-12-17 03:29:31,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2021-12-17 03:29:31,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-17 03:29:31,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:31,908 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:31,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:29:31,909 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:31,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1206857502, now seen corresponding path program 1 times [2021-12-17 03:29:31,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:31,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147321832] [2021-12-17 03:29:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:31,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:31,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:31,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147321832] [2021-12-17 03:29:31,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147321832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:31,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:31,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:31,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20328869] [2021-12-17 03:29:31,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:31,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:31,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:31,961 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:32,602 INFO L93 Difference]: Finished difference Result 1337 states and 2139 transitions. [2021-12-17 03:29:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:32,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2021-12-17 03:29:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:32,605 INFO L225 Difference]: With dead ends: 1337 [2021-12-17 03:29:32,605 INFO L226 Difference]: Without dead ends: 888 [2021-12-17 03:29:32,606 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:32,607 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:32,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 135 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-12-17 03:29:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 880. [2021-12-17 03:29:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.57679180887372) internal successors, (1386), 879 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1386 transitions. [2021-12-17 03:29:32,638 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1386 transitions. Word has length 170 [2021-12-17 03:29:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:32,640 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1386 transitions. [2021-12-17 03:29:32,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1386 transitions. [2021-12-17 03:29:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-17 03:29:32,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:32,648 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:32,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:29:32,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:32,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1599501420, now seen corresponding path program 1 times [2021-12-17 03:29:32,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:32,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451722129] [2021-12-17 03:29:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:32,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:32,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:32,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451722129] [2021-12-17 03:29:32,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451722129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:32,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:32,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:32,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911416145] [2021-12-17 03:29:32,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:32,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:32,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:32,727 INFO L87 Difference]: Start difference. First operand 880 states and 1386 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) [2021-12-17 03:29:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:33,377 INFO L93 Difference]: Finished difference Result 2604 states and 4113 transitions. [2021-12-17 03:29:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:33,377 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 174 [2021-12-17 03:29:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:33,382 INFO L225 Difference]: With dead ends: 2604 [2021-12-17 03:29:33,382 INFO L226 Difference]: Without dead ends: 1726 [2021-12-17 03:29:33,384 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:33,389 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 219 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:33,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 144 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-12-17 03:29:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1714. [2021-12-17 03:29:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.521891418563923) internal successors, (2607), 1713 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2607 transitions. [2021-12-17 03:29:33,421 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2607 transitions. Word has length 174 [2021-12-17 03:29:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:33,421 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2607 transitions. [2021-12-17 03:29:33,421 INFO L471 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) [2021-12-17 03:29:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2607 transitions. [2021-12-17 03:29:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-17 03:29:33,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:33,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:33,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:29:33,426 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash 482259950, now seen corresponding path program 1 times [2021-12-17 03:29:33,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:33,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524649438] [2021-12-17 03:29:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:33,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 03:29:33,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:33,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524649438] [2021-12-17 03:29:33,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524649438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:33,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:33,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:33,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025385471] [2021-12-17 03:29:33,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:33,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:33,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:33,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:33,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:33,487 INFO L87 Difference]: Start difference. First operand 1714 states and 2607 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:34,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:34,079 INFO L93 Difference]: Finished difference Result 5111 states and 7782 transitions. [2021-12-17 03:29:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:34,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 175 [2021-12-17 03:29:34,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:34,089 INFO L225 Difference]: With dead ends: 5111 [2021-12-17 03:29:34,089 INFO L226 Difference]: Without dead ends: 3399 [2021-12-17 03:29:34,091 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:34,092 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 267 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:34,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 170 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3399 states. [2021-12-17 03:29:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3399 to 3387. [2021-12-17 03:29:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.4465445953927938) internal successors, (4898), 3386 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4898 transitions. [2021-12-17 03:29:34,142 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4898 transitions. Word has length 175 [2021-12-17 03:29:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:34,143 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4898 transitions. [2021-12-17 03:29:34,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4898 transitions. [2021-12-17 03:29:34,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-17 03:29:34,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:34,147 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:34,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:29:34,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1721828814, now seen corresponding path program 1 times [2021-12-17 03:29:34,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:34,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433444690] [2021-12-17 03:29:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:34,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:34,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:34,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433444690] [2021-12-17 03:29:34,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433444690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:34,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:34,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:34,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509240298] [2021-12-17 03:29:34,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:34,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:34,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:34,205 INFO L87 Difference]: Start difference. First operand 3387 states and 4898 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:34,510 INFO L93 Difference]: Finished difference Result 6522 states and 9465 transitions. [2021-12-17 03:29:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:34,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2021-12-17 03:29:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:34,520 INFO L225 Difference]: With dead ends: 6522 [2021-12-17 03:29:34,521 INFO L226 Difference]: Without dead ends: 3344 [2021-12-17 03:29:34,525 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:34,526 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:34,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 03:29:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2021-12-17 03:29:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 3344. [2021-12-17 03:29:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.4020341011067903) internal successors, (4687), 3343 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 4687 transitions. [2021-12-17 03:29:34,574 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 4687 transitions. Word has length 177 [2021-12-17 03:29:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:34,575 INFO L470 AbstractCegarLoop]: Abstraction has 3344 states and 4687 transitions. [2021-12-17 03:29:34,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 4687 transitions. [2021-12-17 03:29:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-17 03:29:34,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:34,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:34,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:29:34,579 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1783572521, now seen corresponding path program 1 times [2021-12-17 03:29:34,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:34,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729165386] [2021-12-17 03:29:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:34,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:34,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:34,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729165386] [2021-12-17 03:29:34,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729165386] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:34,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118727163] [2021-12-17 03:29:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:34,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:34,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:34,637 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) [2021-12-17 03:29:34,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:29:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:29:34,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:29:35,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:35,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118727163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:35,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:35,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:29:35,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669502419] [2021-12-17 03:29:35,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:35,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:35,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:35,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:35,169 INFO L87 Difference]: Start difference. First operand 3344 states and 4687 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:35,709 INFO L93 Difference]: Finished difference Result 8125 states and 11479 transitions. [2021-12-17 03:29:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:35,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 [2021-12-17 03:29:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:35,726 INFO L225 Difference]: With dead ends: 8125 [2021-12-17 03:29:35,726 INFO L226 Difference]: Without dead ends: 4783 [2021-12-17 03:29:35,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:35,734 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 79 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:35,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 107 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:29:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-12-17 03:29:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4780. [2021-12-17 03:29:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4779 states have (on average 1.3812513078049802) internal successors, (6601), 4779 states have internal predecessors, (6601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 6601 transitions. [2021-12-17 03:29:35,818 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 6601 transitions. Word has length 181 [2021-12-17 03:29:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:35,819 INFO L470 AbstractCegarLoop]: Abstraction has 4780 states and 6601 transitions. [2021-12-17 03:29:35,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 6601 transitions. [2021-12-17 03:29:35,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-17 03:29:35,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:35,826 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:35,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:29:36,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 03:29:36,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1792558056, now seen corresponding path program 1 times [2021-12-17 03:29:36,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:36,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485201300] [2021-12-17 03:29:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:36,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:29:36,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:36,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485201300] [2021-12-17 03:29:36,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485201300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:36,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:36,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:36,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939890335] [2021-12-17 03:29:36,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:36,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:36,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:36,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:36,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:36,092 INFO L87 Difference]: Start difference. First operand 4780 states and 6601 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:36,618 INFO L93 Difference]: Finished difference Result 10985 states and 15346 transitions. [2021-12-17 03:29:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:36,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 185 [2021-12-17 03:29:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:36,636 INFO L225 Difference]: With dead ends: 10985 [2021-12-17 03:29:36,636 INFO L226 Difference]: Without dead ends: 6412 [2021-12-17 03:29:36,642 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:36,643 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 215 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:36,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 341 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:29:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2021-12-17 03:29:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 6408. [2021-12-17 03:29:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6408 states, 6407 states have (on average 1.323084126736382) internal successors, (8477), 6407 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6408 states to 6408 states and 8477 transitions. [2021-12-17 03:29:36,751 INFO L78 Accepts]: Start accepts. Automaton has 6408 states and 8477 transitions. Word has length 185 [2021-12-17 03:29:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:36,751 INFO L470 AbstractCegarLoop]: Abstraction has 6408 states and 8477 transitions. [2021-12-17 03:29:36,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:36,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6408 states and 8477 transitions. [2021-12-17 03:29:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-17 03:29:36,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:36,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:36,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:29:36,758 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:36,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash -434750219, now seen corresponding path program 1 times [2021-12-17 03:29:36,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:36,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512807916] [2021-12-17 03:29:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:36,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:36,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:36,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512807916] [2021-12-17 03:29:36,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512807916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:36,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:36,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:36,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555424549] [2021-12-17 03:29:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:36,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:36,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:36,812 INFO L87 Difference]: Start difference. First operand 6408 states and 8477 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 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) [2021-12-17 03:29:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:37,419 INFO L93 Difference]: Finished difference Result 18148 states and 24110 transitions. [2021-12-17 03:29:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:37,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 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 187 [2021-12-17 03:29:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:37,450 INFO L225 Difference]: With dead ends: 18148 [2021-12-17 03:29:37,450 INFO L226 Difference]: Without dead ends: 12150 [2021-12-17 03:29:37,459 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:37,460 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 241 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:37,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 103 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:29:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-12-17 03:29:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 12111. [2021-12-17 03:29:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12111 states, 12110 states have (on average 1.3194054500412882) internal successors, (15978), 12110 states have internal predecessors, (15978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12111 states to 12111 states and 15978 transitions. [2021-12-17 03:29:37,627 INFO L78 Accepts]: Start accepts. Automaton has 12111 states and 15978 transitions. Word has length 187 [2021-12-17 03:29:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:37,627 INFO L470 AbstractCegarLoop]: Abstraction has 12111 states and 15978 transitions. [2021-12-17 03:29:37,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 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) [2021-12-17 03:29:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12111 states and 15978 transitions. [2021-12-17 03:29:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 03:29:37,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:37,639 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:37,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:29:37,640 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash -585822876, now seen corresponding path program 1 times [2021-12-17 03:29:37,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:37,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362118016] [2021-12-17 03:29:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:37,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 03:29:37,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:37,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362118016] [2021-12-17 03:29:37,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362118016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:37,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:37,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:37,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249672512] [2021-12-17 03:29:37,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:37,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:37,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:37,684 INFO L87 Difference]: Start difference. First operand 12111 states and 15978 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:37,927 INFO L93 Difference]: Finished difference Result 33224 states and 44035 transitions. [2021-12-17 03:29:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 190 [2021-12-17 03:29:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:37,965 INFO L225 Difference]: With dead ends: 33224 [2021-12-17 03:29:37,965 INFO L226 Difference]: Without dead ends: 22132 [2021-12-17 03:29:37,978 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:37,979 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 322 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:37,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 528 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:29:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22132 states. [2021-12-17 03:29:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22132 to 22113. [2021-12-17 03:29:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22113 states, 22112 states have (on average 1.3226302460202606) internal successors, (29246), 22112 states have internal predecessors, (29246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22113 states to 22113 states and 29246 transitions. [2021-12-17 03:29:38,316 INFO L78 Accepts]: Start accepts. Automaton has 22113 states and 29246 transitions. Word has length 190 [2021-12-17 03:29:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:38,316 INFO L470 AbstractCegarLoop]: Abstraction has 22113 states and 29246 transitions. [2021-12-17 03:29:38,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 22113 states and 29246 transitions. [2021-12-17 03:29:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 03:29:38,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:38,334 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:38,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:29:38,335 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash -17930147, now seen corresponding path program 1 times [2021-12-17 03:29:38,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:38,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762972926] [2021-12-17 03:29:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:38,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:38,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:38,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762972926] [2021-12-17 03:29:38,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762972926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:38,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:38,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:38,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127226307] [2021-12-17 03:29:38,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:38,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:38,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:38,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:38,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:38,377 INFO L87 Difference]: Start difference. First operand 22113 states and 29246 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:39,083 INFO L93 Difference]: Finished difference Result 51615 states and 68625 transitions. [2021-12-17 03:29:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:39,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2021-12-17 03:29:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:39,185 INFO L225 Difference]: With dead ends: 51615 [2021-12-17 03:29:39,185 INFO L226 Difference]: Without dead ends: 30521 [2021-12-17 03:29:39,207 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:39,208 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 208 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:39,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 149 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:29:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30521 states. [2021-12-17 03:29:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30521 to 30462. [2021-12-17 03:29:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30462 states, 30461 states have (on average 1.3286169199960605) internal successors, (40471), 30461 states have internal predecessors, (40471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30462 states to 30462 states and 40471 transitions. [2021-12-17 03:29:39,612 INFO L78 Accepts]: Start accepts. Automaton has 30462 states and 40471 transitions. Word has length 190 [2021-12-17 03:29:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:39,612 INFO L470 AbstractCegarLoop]: Abstraction has 30462 states and 40471 transitions. [2021-12-17 03:29:39,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 30462 states and 40471 transitions. [2021-12-17 03:29:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-17 03:29:39,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:39,635 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:39,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:29:39,636 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash -77081601, now seen corresponding path program 2 times [2021-12-17 03:29:39,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:39,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433112362] [2021-12-17 03:29:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:39,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 03:29:39,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:39,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433112362] [2021-12-17 03:29:39,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433112362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534736021] [2021-12-17 03:29:39,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 03:29:39,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:39,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:39,682 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) [2021-12-17 03:29:39,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:29:39,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 03:29:39,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 03:29:39,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:29:39,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 03:29:40,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:40,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534736021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:40,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:40,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-17 03:29:40,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816271245] [2021-12-17 03:29:40,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:40,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:40,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:40,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:40,120 INFO L87 Difference]: Start difference. First operand 30462 states and 40471 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:40,905 INFO L93 Difference]: Finished difference Result 78648 states and 104984 transitions. [2021-12-17 03:29:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 192 [2021-12-17 03:29:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:41,063 INFO L225 Difference]: With dead ends: 78648 [2021-12-17 03:29:41,064 INFO L226 Difference]: Without dead ends: 48188 [2021-12-17 03:29:41,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:41,087 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 87 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:41,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 116 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48188 states. [2021-12-17 03:29:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48188 to 42286. [2021-12-17 03:29:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42286 states, 42285 states have (on average 1.309613338063143) internal successors, (55377), 42285 states have internal predecessors, (55377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42286 states to 42286 states and 55377 transitions. [2021-12-17 03:29:41,666 INFO L78 Accepts]: Start accepts. Automaton has 42286 states and 55377 transitions. Word has length 192 [2021-12-17 03:29:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:41,666 INFO L470 AbstractCegarLoop]: Abstraction has 42286 states and 55377 transitions. [2021-12-17 03:29:41,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 42286 states and 55377 transitions. [2021-12-17 03:29:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-17 03:29:41,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:41,702 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:41,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:29:41,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 03:29:41,922 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash -867233090, now seen corresponding path program 1 times [2021-12-17 03:29:41,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:41,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078888634] [2021-12-17 03:29:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:41,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 49 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 03:29:42,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:42,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078888634] [2021-12-17 03:29:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078888634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:42,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736840676] [2021-12-17 03:29:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:42,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:42,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:42,086 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) [2021-12-17 03:29:42,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:29:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:29:42,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 03:29:42,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:42,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736840676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:42,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:42,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-17 03:29:42,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92871198] [2021-12-17 03:29:42,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:42,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:42,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:42,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:42,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:42,379 INFO L87 Difference]: Start difference. First operand 42286 states and 55377 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:43,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:43,186 INFO L93 Difference]: Finished difference Result 94476 states and 124307 transitions. [2021-12-17 03:29:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:43,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-12-17 03:29:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:43,260 INFO L225 Difference]: With dead ends: 94476 [2021-12-17 03:29:43,260 INFO L226 Difference]: Without dead ends: 53004 [2021-12-17 03:29:43,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:43,294 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 212 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:43,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 372 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53004 states. [2021-12-17 03:29:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53004 to 49142. [2021-12-17 03:29:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49142 states, 49141 states have (on average 1.2175983394721313) internal successors, (59834), 49141 states have internal predecessors, (59834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49142 states to 49142 states and 59834 transitions. [2021-12-17 03:29:44,040 INFO L78 Accepts]: Start accepts. Automaton has 49142 states and 59834 transitions. Word has length 205 [2021-12-17 03:29:44,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:44,041 INFO L470 AbstractCegarLoop]: Abstraction has 49142 states and 59834 transitions. [2021-12-17 03:29:44,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 49142 states and 59834 transitions. [2021-12-17 03:29:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-17 03:29:44,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:44,065 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:44,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 03:29:44,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:44,282 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:44,283 INFO L85 PathProgramCache]: Analyzing trace with hash 222543559, now seen corresponding path program 1 times [2021-12-17 03:29:44,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:44,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410560793] [2021-12-17 03:29:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:44,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:44,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410560793] [2021-12-17 03:29:44,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410560793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:44,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:44,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:44,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596177143] [2021-12-17 03:29:44,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:44,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:44,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:44,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:44,354 INFO L87 Difference]: Start difference. First operand 49142 states and 59834 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:45,172 INFO L93 Difference]: Finished difference Result 93154 states and 113229 transitions. [2021-12-17 03:29:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 223 [2021-12-17 03:29:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:45,235 INFO L225 Difference]: With dead ends: 93154 [2021-12-17 03:29:45,236 INFO L226 Difference]: Without dead ends: 45841 [2021-12-17 03:29:45,265 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:45,266 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 223 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:45,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 327 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45841 states. [2021-12-17 03:29:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45841 to 36896. [2021-12-17 03:29:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36896 states, 36895 states have (on average 1.165388263992411) internal successors, (42997), 36895 states have internal predecessors, (42997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36896 states to 36896 states and 42997 transitions. [2021-12-17 03:29:45,855 INFO L78 Accepts]: Start accepts. Automaton has 36896 states and 42997 transitions. Word has length 223 [2021-12-17 03:29:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:45,855 INFO L470 AbstractCegarLoop]: Abstraction has 36896 states and 42997 transitions. [2021-12-17 03:29:45,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 36896 states and 42997 transitions. [2021-12-17 03:29:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-17 03:29:45,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:45,874 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-17 03:29:45,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:29:45,874 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:45,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1674569751, now seen corresponding path program 1 times [2021-12-17 03:29:45,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:45,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038849642] [2021-12-17 03:29:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:45,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:45,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:45,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038849642] [2021-12-17 03:29:45,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038849642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:45,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:45,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:45,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425481124] [2021-12-17 03:29:45,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:45,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:45,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:45,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:45,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:45,956 INFO L87 Difference]: Start difference. First operand 36896 states and 42997 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:46,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:46,808 INFO L93 Difference]: Finished difference Result 86983 states and 102703 transitions. [2021-12-17 03:29:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:46,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2021-12-17 03:29:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:46,881 INFO L225 Difference]: With dead ends: 86983 [2021-12-17 03:29:46,882 INFO L226 Difference]: Without dead ends: 50089 [2021-12-17 03:29:46,908 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:46,908 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 152 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:46,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 152 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:29:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50089 states. [2021-12-17 03:29:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50089 to 46841. [2021-12-17 03:29:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46841 states, 46840 states have (on average 1.1349487617421008) internal successors, (53161), 46840 states have internal predecessors, (53161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46841 states to 46841 states and 53161 transitions. [2021-12-17 03:29:47,462 INFO L78 Accepts]: Start accepts. Automaton has 46841 states and 53161 transitions. Word has length 228 [2021-12-17 03:29:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:47,463 INFO L470 AbstractCegarLoop]: Abstraction has 46841 states and 53161 transitions. [2021-12-17 03:29:47,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 46841 states and 53161 transitions. [2021-12-17 03:29:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-17 03:29:47,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:47,476 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:47,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:29:47,477 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash -118373097, now seen corresponding path program 1 times [2021-12-17 03:29:47,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:47,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775432952] [2021-12-17 03:29:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:47,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:47,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:47,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775432952] [2021-12-17 03:29:47,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775432952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:47,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:47,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:47,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324468016] [2021-12-17 03:29:47,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:47,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:47,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:47,542 INFO L87 Difference]: Start difference. First operand 46841 states and 53161 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 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) [2021-12-17 03:29:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:48,375 INFO L93 Difference]: Finished difference Result 97565 states and 110716 transitions. [2021-12-17 03:29:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:48,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 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 239 [2021-12-17 03:29:48,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:48,441 INFO L225 Difference]: With dead ends: 97565 [2021-12-17 03:29:48,442 INFO L226 Difference]: Without dead ends: 51132 [2021-12-17 03:29:48,463 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:48,463 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 151 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:48,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 158 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:29:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51132 states. [2021-12-17 03:29:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51132 to 47450. [2021-12-17 03:29:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47450 states, 47449 states have (on average 1.1353242428712933) internal successors, (53870), 47449 states have internal predecessors, (53870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47450 states to 47450 states and 53870 transitions. [2021-12-17 03:29:49,161 INFO L78 Accepts]: Start accepts. Automaton has 47450 states and 53870 transitions. Word has length 239 [2021-12-17 03:29:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:49,162 INFO L470 AbstractCegarLoop]: Abstraction has 47450 states and 53870 transitions. [2021-12-17 03:29:49,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 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) [2021-12-17 03:29:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 47450 states and 53870 transitions. [2021-12-17 03:29:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-17 03:29:49,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:49,177 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:49,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:29:49,177 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:49,177 INFO L85 PathProgramCache]: Analyzing trace with hash -224143076, now seen corresponding path program 1 times [2021-12-17 03:29:49,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:49,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652498960] [2021-12-17 03:29:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:49,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:29:49,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:49,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652498960] [2021-12-17 03:29:49,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652498960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:49,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:49,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:49,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812514371] [2021-12-17 03:29:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:49,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:29:49,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:49,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:29:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:29:49,274 INFO L87 Difference]: Start difference. First operand 47450 states and 53870 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:50,274 INFO L93 Difference]: Finished difference Result 84695 states and 95995 transitions. [2021-12-17 03:29:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:29:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 252 [2021-12-17 03:29:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:50,317 INFO L225 Difference]: With dead ends: 84695 [2021-12-17 03:29:50,317 INFO L226 Difference]: Without dead ends: 37856 [2021-12-17 03:29:50,344 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:50,345 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 430 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:50,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 54 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:29:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37856 states. [2021-12-17 03:29:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37856 to 37856. [2021-12-17 03:29:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37856 states, 37855 states have (on average 1.0907409853387928) internal successors, (41290), 37855 states have internal predecessors, (41290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37856 states to 37856 states and 41290 transitions. [2021-12-17 03:29:50,843 INFO L78 Accepts]: Start accepts. Automaton has 37856 states and 41290 transitions. Word has length 252 [2021-12-17 03:29:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:50,843 INFO L470 AbstractCegarLoop]: Abstraction has 37856 states and 41290 transitions. [2021-12-17 03:29:50,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 37856 states and 41290 transitions. [2021-12-17 03:29:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-17 03:29:50,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:50,858 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:50,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:29:50,858 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 19903934, now seen corresponding path program 1 times [2021-12-17 03:29:50,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:50,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22162778] [2021-12-17 03:29:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:50,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 03:29:50,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:50,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22162778] [2021-12-17 03:29:50,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22162778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:50,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:50,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:50,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479917139] [2021-12-17 03:29:50,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:50,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:29:50,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:50,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:29:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:29:50,933 INFO L87 Difference]: Start difference. First operand 37856 states and 41290 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:52,118 INFO L93 Difference]: Finished difference Result 92378 states and 101461 transitions. [2021-12-17 03:29:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:29:52,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 257 [2021-12-17 03:29:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:52,181 INFO L225 Difference]: With dead ends: 92378 [2021-12-17 03:29:52,181 INFO L226 Difference]: Without dead ends: 55133 [2021-12-17 03:29:52,207 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:52,207 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 399 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:52,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 85 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:29:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55133 states. [2021-12-17 03:29:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55133 to 48407. [2021-12-17 03:29:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48407 states, 48406 states have (on average 1.091806800809817) internal successors, (52850), 48406 states have internal predecessors, (52850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48407 states to 48407 states and 52850 transitions. [2021-12-17 03:29:52,951 INFO L78 Accepts]: Start accepts. Automaton has 48407 states and 52850 transitions. Word has length 257 [2021-12-17 03:29:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:52,952 INFO L470 AbstractCegarLoop]: Abstraction has 48407 states and 52850 transitions. [2021-12-17 03:29:52,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 48407 states and 52850 transitions. [2021-12-17 03:29:52,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-17 03:29:52,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:52,965 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:52,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:29:52,966 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash 298902643, now seen corresponding path program 1 times [2021-12-17 03:29:52,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:52,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790774961] [2021-12-17 03:29:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:52,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-17 03:29:53,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:53,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790774961] [2021-12-17 03:29:53,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790774961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:53,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603923767] [2021-12-17 03:29:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:53,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:53,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:53,052 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) [2021-12-17 03:29:53,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:29:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:53,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:29:53,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 03:29:53,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:53,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603923767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:53,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:53,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:29:53,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801370621] [2021-12-17 03:29:53,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:53,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:53,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:53,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:53,586 INFO L87 Difference]: Start difference. First operand 48407 states and 52850 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:54,196 INFO L93 Difference]: Finished difference Result 81363 states and 88532 transitions. [2021-12-17 03:29:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:54,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 264 [2021-12-17 03:29:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:54,230 INFO L225 Difference]: With dead ends: 81363 [2021-12-17 03:29:54,231 INFO L226 Difference]: Without dead ends: 33770 [2021-12-17 03:29:54,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:54,257 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 215 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:54,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 342 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:29:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33770 states. [2021-12-17 03:29:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33770 to 21367. [2021-12-17 03:29:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21367 states, 21366 states have (on average 1.0796592717401479) internal successors, (23068), 21366 states have internal predecessors, (23068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21367 states to 21367 states and 23068 transitions. [2021-12-17 03:29:54,587 INFO L78 Accepts]: Start accepts. Automaton has 21367 states and 23068 transitions. Word has length 264 [2021-12-17 03:29:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:54,587 INFO L470 AbstractCegarLoop]: Abstraction has 21367 states and 23068 transitions. [2021-12-17 03:29:54,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21367 states and 23068 transitions. [2021-12-17 03:29:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-17 03:29:54,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:54,595 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:54,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 03:29:54,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 03:29:54,796 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1778431104, now seen corresponding path program 1 times [2021-12-17 03:29:54,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:54,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623674925] [2021-12-17 03:29:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:54,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 03:29:54,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623674925] [2021-12-17 03:29:54,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623674925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:54,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:54,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:54,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347471567] [2021-12-17 03:29:54,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:54,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:54,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:54,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:54,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:54,860 INFO L87 Difference]: Start difference. First operand 21367 states and 23068 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:55,485 INFO L93 Difference]: Finished difference Result 46599 states and 50253 transitions. [2021-12-17 03:29:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 265 [2021-12-17 03:29:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:55,517 INFO L225 Difference]: With dead ends: 46599 [2021-12-17 03:29:55,517 INFO L226 Difference]: Without dead ends: 26046 [2021-12-17 03:29:55,532 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:55,534 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 205 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:55,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 122 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:29:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26046 states. [2021-12-17 03:29:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26046 to 25635. [2021-12-17 03:29:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25635 states, 25634 states have (on average 1.0757197472107358) internal successors, (27575), 25634 states have internal predecessors, (27575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:55,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25635 states to 25635 states and 27575 transitions. [2021-12-17 03:29:55,830 INFO L78 Accepts]: Start accepts. Automaton has 25635 states and 27575 transitions. Word has length 265 [2021-12-17 03:29:55,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:55,831 INFO L470 AbstractCegarLoop]: Abstraction has 25635 states and 27575 transitions. [2021-12-17 03:29:55,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:55,831 INFO L276 IsEmpty]: Start isEmpty. Operand 25635 states and 27575 transitions. [2021-12-17 03:29:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-17 03:29:55,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:55,840 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:55,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 03:29:55,840 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:55,841 INFO L85 PathProgramCache]: Analyzing trace with hash -565522048, now seen corresponding path program 1 times [2021-12-17 03:29:55,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:55,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540905307] [2021-12-17 03:29:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:55,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 03:29:55,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:55,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540905307] [2021-12-17 03:29:55,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540905307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:55,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:55,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:55,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328950714] [2021-12-17 03:29:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:55,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:55,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:55,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:55,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:55,920 INFO L87 Difference]: Start difference. First operand 25635 states and 27575 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:56,467 INFO L93 Difference]: Finished difference Result 50659 states and 54482 transitions. [2021-12-17 03:29:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 273 [2021-12-17 03:29:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:56,493 INFO L225 Difference]: With dead ends: 50659 [2021-12-17 03:29:56,493 INFO L226 Difference]: Without dead ends: 25838 [2021-12-17 03:29:56,509 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:29:56,509 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:56,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 158 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:29:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25838 states. [2021-12-17 03:29:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25838 to 25838. [2021-12-17 03:29:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25838 states, 25837 states have (on average 1.0755892712002166) internal successors, (27790), 25837 states have internal predecessors, (27790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25838 states to 25838 states and 27790 transitions. [2021-12-17 03:29:56,901 INFO L78 Accepts]: Start accepts. Automaton has 25838 states and 27790 transitions. Word has length 273 [2021-12-17 03:29:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:56,901 INFO L470 AbstractCegarLoop]: Abstraction has 25838 states and 27790 transitions. [2021-12-17 03:29:56,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 25838 states and 27790 transitions. [2021-12-17 03:29:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-17 03:29:56,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:56,911 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:56,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 03:29:56,912 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 451540533, now seen corresponding path program 1 times [2021-12-17 03:29:56,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:56,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611849339] [2021-12-17 03:29:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:56,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 03:29:56,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611849339] [2021-12-17 03:29:56,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611849339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078331071] [2021-12-17 03:29:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:56,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:56,984 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) [2021-12-17 03:29:56,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 03:29:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:29:57,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:29:57,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:57,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078331071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:57,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:57,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:29:57,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000914635] [2021-12-17 03:29:57,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:57,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:57,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:57,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:57,439 INFO L87 Difference]: Start difference. First operand 25838 states and 27790 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:58,065 INFO L93 Difference]: Finished difference Result 53921 states and 58018 transitions. [2021-12-17 03:29:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:58,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 280 [2021-12-17 03:29:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:58,206 INFO L225 Difference]: With dead ends: 53921 [2021-12-17 03:29:58,206 INFO L226 Difference]: Without dead ends: 29100 [2021-12-17 03:29:58,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:58,214 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:58,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 151 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:29:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29100 states. [2021-12-17 03:29:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29100 to 26648. [2021-12-17 03:29:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26648 states, 26647 states have (on average 1.0746050212031373) internal successors, (28635), 26647 states have internal predecessors, (28635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26648 states to 26648 states and 28635 transitions. [2021-12-17 03:29:58,449 INFO L78 Accepts]: Start accepts. Automaton has 26648 states and 28635 transitions. Word has length 280 [2021-12-17 03:29:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:58,450 INFO L470 AbstractCegarLoop]: Abstraction has 26648 states and 28635 transitions. [2021-12-17 03:29:58,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 26648 states and 28635 transitions. [2021-12-17 03:29:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-17 03:29:58,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:58,461 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 03:29:58,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 03:29:58,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:58,663 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash 929271362, now seen corresponding path program 1 times [2021-12-17 03:29:58,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:58,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217887960] [2021-12-17 03:29:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:58,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 84 proven. 11 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 03:29:58,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:58,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217887960] [2021-12-17 03:29:58,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217887960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:58,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378397865] [2021-12-17 03:29:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:58,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:58,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:29:58,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 03:29:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:58,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:29:58,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:29:59,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:59,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378397865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:59,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:59,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:29:59,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48059988] [2021-12-17 03:29:59,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:59,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:59,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:59,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:59,167 INFO L87 Difference]: Start difference. First operand 26648 states and 28635 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) [2021-12-17 03:29:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:59,620 INFO L93 Difference]: Finished difference Result 69964 states and 75055 transitions. [2021-12-17 03:29:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:59,622 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 280 [2021-12-17 03:29:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:59,669 INFO L225 Difference]: With dead ends: 69964 [2021-12-17 03:29:59,669 INFO L226 Difference]: Without dead ends: 44333 [2021-12-17 03:29:59,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:59,690 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 223 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:59,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 800 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 03:29:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44333 states. [2021-12-17 03:30:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44333 to 42504. [2021-12-17 03:30:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42504 states, 42503 states have (on average 1.067030562548526) internal successors, (45352), 42503 states have internal predecessors, (45352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42504 states to 42504 states and 45352 transitions. [2021-12-17 03:30:00,251 INFO L78 Accepts]: Start accepts. Automaton has 42504 states and 45352 transitions. Word has length 280 [2021-12-17 03:30:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:00,252 INFO L470 AbstractCegarLoop]: Abstraction has 42504 states and 45352 transitions. [2021-12-17 03:30:00,252 INFO L471 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) [2021-12-17 03:30:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 42504 states and 45352 transitions. [2021-12-17 03:30:00,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-12-17 03:30:00,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:00,265 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:00,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 03:30:00,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:00,467 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash -47643238, now seen corresponding path program 1 times [2021-12-17 03:30:00,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:00,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771583741] [2021-12-17 03:30:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:00,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-17 03:30:00,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:00,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771583741] [2021-12-17 03:30:00,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771583741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805565543] [2021-12-17 03:30:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:00,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:00,542 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:00,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 03:30:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:00,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 03:30:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 108 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 03:30:01,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:30:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 108 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 03:30:01,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805565543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:30:01,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:30:01,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2021-12-17 03:30:01,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745883292] [2021-12-17 03:30:01,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:30:01,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 03:30:01,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 03:30:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:30:01,499 INFO L87 Difference]: Start difference. First operand 42504 states and 45352 transitions. Second operand has 6 states, 6 states have (on average 75.83333333333333) internal successors, (455), 6 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:04,674 INFO L93 Difference]: Finished difference Result 170245 states and 181919 transitions. [2021-12-17 03:30:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 03:30:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 75.83333333333333) internal successors, (455), 6 states have internal predecessors, (455), 0 states have call successors, (0), 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 284 [2021-12-17 03:30:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:04,965 INFO L225 Difference]: With dead ends: 170245 [2021-12-17 03:30:04,965 INFO L226 Difference]: Without dead ends: 127946 [2021-12-17 03:30:04,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 575 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-17 03:30:04,993 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 3223 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 3277 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3223 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 4134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 3277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:04,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3223 Valid, 539 Invalid, 4134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 3277 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 03:30:05,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127946 states. [2021-12-17 03:30:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127946 to 124455. [2021-12-17 03:30:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124455 states, 124454 states have (on average 1.0628344609253217) internal successors, (132274), 124454 states have internal predecessors, (132274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124455 states to 124455 states and 132274 transitions. [2021-12-17 03:30:06,624 INFO L78 Accepts]: Start accepts. Automaton has 124455 states and 132274 transitions. Word has length 284 [2021-12-17 03:30:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:06,624 INFO L470 AbstractCegarLoop]: Abstraction has 124455 states and 132274 transitions. [2021-12-17 03:30:06,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.83333333333333) internal successors, (455), 6 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 124455 states and 132274 transitions. [2021-12-17 03:30:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-17 03:30:06,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:06,643 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 03:30:06,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 03:30:06,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:06,852 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:06,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:06,852 INFO L85 PathProgramCache]: Analyzing trace with hash 828076308, now seen corresponding path program 1 times [2021-12-17 03:30:06,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:06,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948805369] [2021-12-17 03:30:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:06,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:30:06,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:06,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948805369] [2021-12-17 03:30:06,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948805369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:06,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:06,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:30:06,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365141223] [2021-12-17 03:30:06,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:06,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:06,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:06,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:06,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:06,951 INFO L87 Difference]: Start difference. First operand 124455 states and 132274 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:08,145 INFO L93 Difference]: Finished difference Result 248096 states and 263684 transitions. [2021-12-17 03:30:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 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 303 [2021-12-17 03:30:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:08,305 INFO L225 Difference]: With dead ends: 248096 [2021-12-17 03:30:08,305 INFO L226 Difference]: Without dead ends: 124455 [2021-12-17 03:30:08,359 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:30:08,359 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 67 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:08,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 161 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:30:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124455 states. [2021-12-17 03:30:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124455 to 124455. [2021-12-17 03:30:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124455 states, 124454 states have (on average 1.0628264258280167) internal successors, (132273), 124454 states have internal predecessors, (132273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124455 states to 124455 states and 132273 transitions. [2021-12-17 03:30:10,371 INFO L78 Accepts]: Start accepts. Automaton has 124455 states and 132273 transitions. Word has length 303 [2021-12-17 03:30:10,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:10,371 INFO L470 AbstractCegarLoop]: Abstraction has 124455 states and 132273 transitions. [2021-12-17 03:30:10,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 124455 states and 132273 transitions. [2021-12-17 03:30:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-17 03:30:10,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:10,389 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:10,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 03:30:10,389 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:10,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1045586914, now seen corresponding path program 1 times [2021-12-17 03:30:10,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:10,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069423075] [2021-12-17 03:30:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:10,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 114 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-17 03:30:10,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:10,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069423075] [2021-12-17 03:30:10,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069423075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:10,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474091463] [2021-12-17 03:30:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:10,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:10,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:10,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 03:30:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:10,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:30:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-17 03:30:10,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:30:10,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474091463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:10,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:30:10,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:30:10,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600095292] [2021-12-17 03:30:10,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:10,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:10,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:10,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:10,988 INFO L87 Difference]: Start difference. First operand 124455 states and 132273 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:12,280 INFO L93 Difference]: Finished difference Result 244656 states and 259993 transitions. [2021-12-17 03:30:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2021-12-17 03:30:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:12,439 INFO L225 Difference]: With dead ends: 244656 [2021-12-17 03:30:12,439 INFO L226 Difference]: Without dead ends: 121015 [2021-12-17 03:30:12,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:12,479 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 100 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:12,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 287 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:30:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121015 states. [2021-12-17 03:30:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121015 to 118361. [2021-12-17 03:30:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118361 states, 118360 states have (on average 1.0598766475160528) internal successors, (125447), 118360 states have internal predecessors, (125447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118361 states to 118361 states and 125447 transitions. [2021-12-17 03:30:14,233 INFO L78 Accepts]: Start accepts. Automaton has 118361 states and 125447 transitions. Word has length 306 [2021-12-17 03:30:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:14,234 INFO L470 AbstractCegarLoop]: Abstraction has 118361 states and 125447 transitions. [2021-12-17 03:30:14,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 118361 states and 125447 transitions. [2021-12-17 03:30:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-17 03:30:14,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:14,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 03:30:14,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 03:30:14,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 03:30:14,453 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:14,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1383672585, now seen corresponding path program 1 times [2021-12-17 03:30:14,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:14,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288267000] [2021-12-17 03:30:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:14,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 145 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:30:14,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:14,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288267000] [2021-12-17 03:30:14,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288267000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:14,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530769247] [2021-12-17 03:30:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:14,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:14,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:14,569 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:14,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 03:30:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:14,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:30:14,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:30:15,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:30:15,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530769247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:15,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:30:15,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:30:15,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846320399] [2021-12-17 03:30:15,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:15,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:15,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:15,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:15,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:15,357 INFO L87 Difference]: Start difference. First operand 118361 states and 125447 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:16,501 INFO L93 Difference]: Finished difference Result 233467 states and 247485 transitions. [2021-12-17 03:30:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2021-12-17 03:30:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:16,638 INFO L225 Difference]: With dead ends: 233467 [2021-12-17 03:30:16,638 INFO L226 Difference]: Without dead ends: 115920 [2021-12-17 03:30:16,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:16,704 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:16,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 355 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:30:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115920 states. [2021-12-17 03:30:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115920 to 114690. [2021-12-17 03:30:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114690 states, 114689 states have (on average 1.0580090505628263) internal successors, (121342), 114689 states have internal predecessors, (121342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114690 states to 114690 states and 121342 transitions. [2021-12-17 03:30:18,418 INFO L78 Accepts]: Start accepts. Automaton has 114690 states and 121342 transitions. Word has length 310 [2021-12-17 03:30:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:18,418 INFO L470 AbstractCegarLoop]: Abstraction has 114690 states and 121342 transitions. [2021-12-17 03:30:18,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 114690 states and 121342 transitions. [2021-12-17 03:30:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-17 03:30:18,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:18,442 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 03:30:18,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 03:30:18,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 03:30:18,643 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:18,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1385480577, now seen corresponding path program 1 times [2021-12-17 03:30:18,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:18,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122386803] [2021-12-17 03:30:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:18,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 84 proven. 11 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-17 03:30:18,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122386803] [2021-12-17 03:30:18,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122386803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456509297] [2021-12-17 03:30:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:18,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:18,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:18,742 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:18,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 03:30:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:18,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:30:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-17 03:30:19,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:30:19,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456509297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:19,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:30:19,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:30:19,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312450896] [2021-12-17 03:30:19,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:19,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:19,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:19,312 INFO L87 Difference]: Start difference. First operand 114690 states and 121342 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:20,538 INFO L93 Difference]: Finished difference Result 230427 states and 243944 transitions. [2021-12-17 03:30:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:20,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2021-12-17 03:30:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:20,680 INFO L225 Difference]: With dead ends: 230427 [2021-12-17 03:30:20,680 INFO L226 Difference]: Without dead ends: 116551 [2021-12-17 03:30:20,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:20,731 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 59 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:20,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 348 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:20,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116551 states. [2021-12-17 03:30:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116551 to 113878. [2021-12-17 03:30:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113878 states, 113877 states have (on average 1.057298664348376) internal successors, (120402), 113877 states have internal predecessors, (120402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113878 states to 113878 states and 120402 transitions. [2021-12-17 03:30:22,460 INFO L78 Accepts]: Start accepts. Automaton has 113878 states and 120402 transitions. Word has length 333 [2021-12-17 03:30:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:22,460 INFO L470 AbstractCegarLoop]: Abstraction has 113878 states and 120402 transitions. [2021-12-17 03:30:22,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 113878 states and 120402 transitions. [2021-12-17 03:30:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-17 03:30:22,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:22,483 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 03:30:22,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 03:30:22,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 03:30:22,686 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1438364210, now seen corresponding path program 1 times [2021-12-17 03:30:22,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:22,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353242905] [2021-12-17 03:30:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:22,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-17 03:30:22,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:22,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353242905] [2021-12-17 03:30:22,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353242905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:22,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961242489] [2021-12-17 03:30:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:22,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:22,759 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:22,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 03:30:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:22,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 03:30:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-17 03:30:23,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:30:23,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961242489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:23,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:30:23,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:30:23,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874562496] [2021-12-17 03:30:23,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:23,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:30:23,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:30:23,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:30:23,307 INFO L87 Difference]: Start difference. First operand 113878 states and 120402 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:24,801 INFO L93 Difference]: Finished difference Result 311689 states and 328950 transitions. [2021-12-17 03:30:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:30:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 344 [2021-12-17 03:30:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:25,103 INFO L225 Difference]: With dead ends: 311689 [2021-12-17 03:30:25,104 INFO L226 Difference]: Without dead ends: 198625 [2021-12-17 03:30:25,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:30:25,180 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 730 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:25,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 320 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198625 states.