./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/Problem17_label15.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 a8ce96d555e872b609ed7174eef821f9a0406316106ba92ad582ec48aa272726 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:53:03,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:53:03,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:53:03,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:53:03,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:53:03,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:53:03,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:53:03,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:53:03,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:53:03,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:53:03,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:53:03,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:53:03,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:53:03,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:53:03,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:53:03,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:53:03,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:53:03,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:53:03,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:53:03,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:53:03,202 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:53:03,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:53:03,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:53:03,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:53:03,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:53:03,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:53:03,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:53:03,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:53:03,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:53:03,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:53:03,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:53:03,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:53:03,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:53:03,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:53:03,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:53:03,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:53:03,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:53:03,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:53:03,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:53:03,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:53:03,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:53:03,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:53:03,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:53:03,244 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:53:03,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:53:03,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:53:03,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:53:03,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:53:03,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:53:03,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:53:03,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:53:03,246 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:53:03,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:53:03,247 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:53:03,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:53:03,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:53:03,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:53:03,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:53:03,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:53:03,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:53:03,248 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:53:03,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:53:03,249 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:53:03,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:53:03,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:53:03,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:53:03,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:53:03,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:53:03,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:53:03,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:53:03,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:53:03,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:53:03,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:53:03,251 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:53:03,251 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:53:03,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:53:03,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8ce96d555e872b609ed7174eef821f9a0406316106ba92ad582ec48aa272726 [2022-07-22 12:53:03,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:53:03,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:53:03,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:53:03,436 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:53:03,440 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:53:03,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label15.c [2022-07-22 12:53:03,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9828842/4be3e154ebb04214bfdc9cb809ae741c/FLAG6fcba1c55 [2022-07-22 12:53:04,056 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:53:04,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label15.c [2022-07-22 12:53:04,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9828842/4be3e154ebb04214bfdc9cb809ae741c/FLAG6fcba1c55 [2022-07-22 12:53:04,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9828842/4be3e154ebb04214bfdc9cb809ae741c [2022-07-22 12:53:04,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:53:04,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:53:04,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:53:04,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:53:04,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:53:04,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:53:04" (1/1) ... [2022-07-22 12:53:04,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ce2b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:04, skipping insertion in model container [2022-07-22 12:53:04,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:53:04" (1/1) ... [2022-07-22 12:53:04,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:53:04,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:53:04,738 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/Problem17_label15.c[5490,5503] [2022-07-22 12:53:05,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:53:05,112 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:53:05,134 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label15.c[5490,5503] [2022-07-22 12:53:05,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:53:05,318 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:53:05,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05 WrapperNode [2022-07-22 12:53:05,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:53:05,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:53:05,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:53:05,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:53:05,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,559 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-22 12:53:05,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:53:05,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:53:05,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:53:05,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:53:05,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:53:05,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:53:05,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:53:05,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:53:05,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (1/1) ... [2022-07-22 12:53:05,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:53:05,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:06,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 12:53:06,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 12:53:06,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:53:06,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:53:06,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:53:06,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:53:06,120 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:53:06,121 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:53:08,307 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:53:08,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:53:08,316 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:53:08,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:53:08 BoogieIcfgContainer [2022-07-22 12:53:08,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:53:08,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:53:08,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:53:08,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:53:08,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:53:04" (1/3) ... [2022-07-22 12:53:08,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234b04cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:53:08, skipping insertion in model container [2022-07-22 12:53:08,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:53:05" (2/3) ... [2022-07-22 12:53:08,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234b04cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:53:08, skipping insertion in model container [2022-07-22 12:53:08,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:53:08" (3/3) ... [2022-07-22 12:53:08,346 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label15.c [2022-07-22 12:53:08,355 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:53:08,356 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:53:08,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:53:08,416 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4485c19c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e2cf45d [2022-07-22 12:53:08,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:53:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 12:53:08,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:08,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:08,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2022-07-22 12:53:08,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:08,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053516782] [2022-07-22 12:53:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:08,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:53:08,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:08,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053516782] [2022-07-22 12:53:08,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053516782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:08,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:08,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:53:08,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225761608] [2022-07-22 12:53:08,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:08,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:08,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:08,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:08,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:08,644 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:10,850 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2022-07-22 12:53:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-22 12:53:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:10,867 INFO L225 Difference]: With dead ends: 1680 [2022-07-22 12:53:10,867 INFO L226 Difference]: Without dead ends: 1011 [2022-07-22 12:53:10,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:10,874 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 545 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:10,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 12:53:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-07-22 12:53:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2022-07-22 12:53:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2022-07-22 12:53:10,931 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 36 [2022-07-22 12:53:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:10,932 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2022-07-22 12:53:10,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2022-07-22 12:53:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 12:53:10,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:10,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:10,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:53:10,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1022017857, now seen corresponding path program 1 times [2022-07-22 12:53:10,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:10,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920351258] [2022-07-22 12:53:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:10,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:53:11,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920351258] [2022-07-22 12:53:11,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920351258] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:11,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:11,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:53:11,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668942918] [2022-07-22 12:53:11,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:11,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:11,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:11,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:11,035 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:12,937 INFO L93 Difference]: Finished difference Result 2871 states and 5025 transitions. [2022-07-22 12:53:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2022-07-22 12:53:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:12,944 INFO L225 Difference]: With dead ends: 2871 [2022-07-22 12:53:12,944 INFO L226 Difference]: Without dead ends: 1877 [2022-07-22 12:53:12,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:12,947 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:12,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 520 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 12:53:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-07-22 12:53:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1870. [2022-07-22 12:53:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4719101123595506) internal successors, (2751), 1869 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2751 transitions. [2022-07-22 12:53:12,996 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2751 transitions. Word has length 101 [2022-07-22 12:53:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:12,997 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2751 transitions. [2022-07-22 12:53:12,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2751 transitions. [2022-07-22 12:53:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 12:53:12,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:12,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:12,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:53:12,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash 688837838, now seen corresponding path program 1 times [2022-07-22 12:53:13,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863853711] [2022-07-22 12:53:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:53:13,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863853711] [2022-07-22 12:53:13,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863853711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:13,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:13,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847240331] [2022-07-22 12:53:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:13,120 INFO L87 Difference]: Start difference. First operand 1870 states and 2751 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:16,322 INFO L93 Difference]: Finished difference Result 6370 states and 9654 transitions. [2022-07-22 12:53:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:16,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-22 12:53:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:16,335 INFO L225 Difference]: With dead ends: 6370 [2022-07-22 12:53:16,336 INFO L226 Difference]: Without dead ends: 4502 [2022-07-22 12:53:16,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:16,340 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1084 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:16,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 193 Invalid, 3475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [893 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:53:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4502 states. [2022-07-22 12:53:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4502 to 4497. [2022-07-22 12:53:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4497 states, 4496 states have (on average 1.4270462633451957) internal successors, (6416), 4496 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 6416 transitions. [2022-07-22 12:53:16,410 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 6416 transitions. Word has length 106 [2022-07-22 12:53:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:16,411 INFO L495 AbstractCegarLoop]: Abstraction has 4497 states and 6416 transitions. [2022-07-22 12:53:16,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 6416 transitions. [2022-07-22 12:53:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 12:53:16,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:16,413 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:16,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:53:16,413 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:16,414 INFO L85 PathProgramCache]: Analyzing trace with hash 785603270, now seen corresponding path program 1 times [2022-07-22 12:53:16,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:16,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255463926] [2022-07-22 12:53:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:16,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:53:16,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:16,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255463926] [2022-07-22 12:53:16,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255463926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:16,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:16,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:53:16,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391149392] [2022-07-22 12:53:16,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:16,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:16,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:16,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:16,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:16,564 INFO L87 Difference]: Start difference. First operand 4497 states and 6416 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:18,425 INFO L93 Difference]: Finished difference Result 11974 states and 17431 transitions. [2022-07-22 12:53:18,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:18,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 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 142 [2022-07-22 12:53:18,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:18,446 INFO L225 Difference]: With dead ends: 11974 [2022-07-22 12:53:18,446 INFO L226 Difference]: Without dead ends: 7479 [2022-07-22 12:53:18,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:18,453 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 364 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:18,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 497 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 12:53:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7479 states. [2022-07-22 12:53:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7479 to 7046. [2022-07-22 12:53:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7045 states have (on average 1.3349893541518807) internal successors, (9405), 7045 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 9405 transitions. [2022-07-22 12:53:18,559 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 9405 transitions. Word has length 142 [2022-07-22 12:53:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:18,560 INFO L495 AbstractCegarLoop]: Abstraction has 7046 states and 9405 transitions. [2022-07-22 12:53:18,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 9405 transitions. [2022-07-22 12:53:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-22 12:53:18,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:18,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:53:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:53:18,566 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1939867091, now seen corresponding path program 1 times [2022-07-22 12:53:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:18,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925855995] [2022-07-22 12:53:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 12:53:18,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:18,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925855995] [2022-07-22 12:53:18,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925855995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:18,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:18,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:53:18,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143679585] [2022-07-22 12:53:18,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:18,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:18,696 INFO L87 Difference]: Start difference. First operand 7046 states and 9405 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:20,284 INFO L93 Difference]: Finished difference Result 18773 states and 25521 transitions. [2022-07-22 12:53:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:20,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 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 171 [2022-07-22 12:53:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:20,312 INFO L225 Difference]: With dead ends: 18773 [2022-07-22 12:53:20,313 INFO L226 Difference]: Without dead ends: 11300 [2022-07-22 12:53:20,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:20,323 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:20,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:53:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11300 states. [2022-07-22 12:53:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11300 to 8323. [2022-07-22 12:53:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8322 states have (on average 1.2595529920692141) internal successors, (10482), 8322 states have internal predecessors, (10482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 10482 transitions. [2022-07-22 12:53:20,439 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 10482 transitions. Word has length 171 [2022-07-22 12:53:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:20,439 INFO L495 AbstractCegarLoop]: Abstraction has 8323 states and 10482 transitions. [2022-07-22 12:53:20,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 10482 transitions. [2022-07-22 12:53:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-22 12:53:20,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:20,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:53:20,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:53:20,445 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2143225073, now seen corresponding path program 1 times [2022-07-22 12:53:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:20,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466073369] [2022-07-22 12:53:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:20,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:53:20,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:20,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466073369] [2022-07-22 12:53:20,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466073369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:20,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:20,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 12:53:20,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998337525] [2022-07-22 12:53:20,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:20,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:53:20,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:20,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:53:20,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:53:20,556 INFO L87 Difference]: Start difference. First operand 8323 states and 10482 transitions. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:22,521 INFO L93 Difference]: Finished difference Result 21360 states and 27400 transitions. [2022-07-22 12:53:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 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 184 [2022-07-22 12:53:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:22,541 INFO L225 Difference]: With dead ends: 21360 [2022-07-22 12:53:22,542 INFO L226 Difference]: Without dead ends: 13039 [2022-07-22 12:53:22,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:53:22,552 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 1164 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 780 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:22,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 834 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [780 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 12:53:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13039 states. [2022-07-22 12:53:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13039 to 12996. [2022-07-22 12:53:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12996 states, 12995 states have (on average 1.2273951519815314) internal successors, (15950), 12995 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12996 states to 12996 states and 15950 transitions. [2022-07-22 12:53:22,711 INFO L78 Accepts]: Start accepts. Automaton has 12996 states and 15950 transitions. Word has length 184 [2022-07-22 12:53:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:22,711 INFO L495 AbstractCegarLoop]: Abstraction has 12996 states and 15950 transitions. [2022-07-22 12:53:22,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 12996 states and 15950 transitions. [2022-07-22 12:53:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-07-22 12:53:22,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:22,715 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:53:22,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash -525885613, now seen corresponding path program 1 times [2022-07-22 12:53:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:22,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490528996] [2022-07-22 12:53:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:22,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-07-22 12:53:22,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490528996] [2022-07-22 12:53:22,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490528996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:22,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:22,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352132041] [2022-07-22 12:53:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:22,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:22,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:22,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:22,807 INFO L87 Difference]: Start difference. First operand 12996 states and 15950 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:24,585 INFO L93 Difference]: Finished difference Result 31503 states and 38604 transitions. [2022-07-22 12:53:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:24,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 289 [2022-07-22 12:53:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:24,625 INFO L225 Difference]: With dead ends: 31503 [2022-07-22 12:53:24,625 INFO L226 Difference]: Without dead ends: 17659 [2022-07-22 12:53:24,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:24,640 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 408 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:24,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 952 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:53:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17659 states. [2022-07-22 12:53:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17659 to 12122. [2022-07-22 12:53:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12122 states, 12121 states have (on average 1.1796881445425296) internal successors, (14299), 12121 states have internal predecessors, (14299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12122 states to 12122 states and 14299 transitions. [2022-07-22 12:53:24,791 INFO L78 Accepts]: Start accepts. Automaton has 12122 states and 14299 transitions. Word has length 289 [2022-07-22 12:53:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:24,791 INFO L495 AbstractCegarLoop]: Abstraction has 12122 states and 14299 transitions. [2022-07-22 12:53:24,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 12122 states and 14299 transitions. [2022-07-22 12:53:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-07-22 12:53:24,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:24,795 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:24,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:53:24,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1232130859, now seen corresponding path program 1 times [2022-07-22 12:53:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:24,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505338943] [2022-07-22 12:53:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-22 12:53:24,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:24,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505338943] [2022-07-22 12:53:24,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505338943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:24,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:24,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:24,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967468950] [2022-07-22 12:53:24,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:24,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:24,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:24,909 INFO L87 Difference]: Start difference. First operand 12122 states and 14299 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:26,601 INFO L93 Difference]: Finished difference Result 31047 states and 36683 transitions. [2022-07-22 12:53:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:26,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 [2022-07-22 12:53:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:26,630 INFO L225 Difference]: With dead ends: 31047 [2022-07-22 12:53:26,631 INFO L226 Difference]: Without dead ends: 18927 [2022-07-22 12:53:26,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:26,644 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 457 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:26,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 405 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:53:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18927 states. [2022-07-22 12:53:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18927 to 16794. [2022-07-22 12:53:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16794 states, 16793 states have (on average 1.1678675638658964) internal successors, (19612), 16793 states have internal predecessors, (19612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16794 states to 16794 states and 19612 transitions. [2022-07-22 12:53:26,813 INFO L78 Accepts]: Start accepts. Automaton has 16794 states and 19612 transitions. Word has length 306 [2022-07-22 12:53:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:26,814 INFO L495 AbstractCegarLoop]: Abstraction has 16794 states and 19612 transitions. [2022-07-22 12:53:26,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 16794 states and 19612 transitions. [2022-07-22 12:53:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-07-22 12:53:26,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:26,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:26,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:53:26,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1461489624, now seen corresponding path program 1 times [2022-07-22 12:53:26,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:26,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142784570] [2022-07-22 12:53:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:26,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 12:53:26,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:26,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142784570] [2022-07-22 12:53:26,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142784570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:26,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:26,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519325798] [2022-07-22 12:53:26,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:26,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:26,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:26,931 INFO L87 Difference]: Start difference. First operand 16794 states and 19612 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:28,618 INFO L93 Difference]: Finished difference Result 40447 states and 47562 transitions. [2022-07-22 12:53:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 350 [2022-07-22 12:53:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:28,655 INFO L225 Difference]: With dead ends: 40447 [2022-07-22 12:53:28,655 INFO L226 Difference]: Without dead ends: 22805 [2022-07-22 12:53:28,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:28,670 INFO L413 NwaCegarLoop]: 845 mSDtfsCounter, 382 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:28,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 920 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:53:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22805 states. [2022-07-22 12:53:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22805 to 22370. [2022-07-22 12:53:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22370 states, 22369 states have (on average 1.1468550225758862) internal successors, (25654), 22369 states have internal predecessors, (25654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22370 states to 22370 states and 25654 transitions. [2022-07-22 12:53:28,912 INFO L78 Accepts]: Start accepts. Automaton has 22370 states and 25654 transitions. Word has length 350 [2022-07-22 12:53:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:28,914 INFO L495 AbstractCegarLoop]: Abstraction has 22370 states and 25654 transitions. [2022-07-22 12:53:28,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:28,915 INFO L276 IsEmpty]: Start isEmpty. Operand 22370 states and 25654 transitions. [2022-07-22 12:53:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-07-22 12:53:28,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:28,920 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:28,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:53:28,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:28,927 INFO L85 PathProgramCache]: Analyzing trace with hash -397845730, now seen corresponding path program 1 times [2022-07-22 12:53:28,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:28,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290617936] [2022-07-22 12:53:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:28,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:53:29,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:29,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290617936] [2022-07-22 12:53:29,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290617936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:29,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:29,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:29,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017496568] [2022-07-22 12:53:29,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:29,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:29,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:29,052 INFO L87 Difference]: Start difference. First operand 22370 states and 25654 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:30,770 INFO L93 Difference]: Finished difference Result 55832 states and 64075 transitions. [2022-07-22 12:53:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:30,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 357 [2022-07-22 12:53:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:30,808 INFO L225 Difference]: With dead ends: 55832 [2022-07-22 12:53:30,808 INFO L226 Difference]: Without dead ends: 33024 [2022-07-22 12:53:30,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:30,826 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 397 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:30,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 763 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:53:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33024 states. [2022-07-22 12:53:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33024 to 28338. [2022-07-22 12:53:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28338 states, 28337 states have (on average 1.144545999929421) internal successors, (32433), 28337 states have internal predecessors, (32433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28338 states to 28338 states and 32433 transitions. [2022-07-22 12:53:31,107 INFO L78 Accepts]: Start accepts. Automaton has 28338 states and 32433 transitions. Word has length 357 [2022-07-22 12:53:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:31,108 INFO L495 AbstractCegarLoop]: Abstraction has 28338 states and 32433 transitions. [2022-07-22 12:53:31,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 28338 states and 32433 transitions. [2022-07-22 12:53:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-07-22 12:53:31,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:31,117 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-22 12:53:31,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 12:53:31,117 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1041601103, now seen corresponding path program 1 times [2022-07-22 12:53:31,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:31,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576450085] [2022-07-22 12:53:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:31,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 527 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-22 12:53:31,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576450085] [2022-07-22 12:53:31,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576450085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:31,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:31,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:31,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099914390] [2022-07-22 12:53:31,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:31,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:31,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:31,275 INFO L87 Difference]: Start difference. First operand 28338 states and 32433 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:33,026 INFO L93 Difference]: Finished difference Result 70298 states and 80376 transitions. [2022-07-22 12:53:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 432 [2022-07-22 12:53:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:33,070 INFO L225 Difference]: With dead ends: 70298 [2022-07-22 12:53:33,070 INFO L226 Difference]: Without dead ends: 41095 [2022-07-22 12:53:33,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:33,092 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 447 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:33,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 651 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:53:33,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41095 states. [2022-07-22 12:53:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41095 to 36829. [2022-07-22 12:53:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36829 states, 36828 states have (on average 1.1286249592701205) internal successors, (41565), 36828 states have internal predecessors, (41565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36829 states to 36829 states and 41565 transitions. [2022-07-22 12:53:33,592 INFO L78 Accepts]: Start accepts. Automaton has 36829 states and 41565 transitions. Word has length 432 [2022-07-22 12:53:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:33,592 INFO L495 AbstractCegarLoop]: Abstraction has 36829 states and 41565 transitions. [2022-07-22 12:53:33,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 36829 states and 41565 transitions. [2022-07-22 12:53:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-07-22 12:53:33,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:33,602 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:33,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 12:53:33,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:33,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1448528408, now seen corresponding path program 1 times [2022-07-22 12:53:33,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:33,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131056939] [2022-07-22 12:53:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:33,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 12:53:33,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:33,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131056939] [2022-07-22 12:53:33,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131056939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:33,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:33,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:53:33,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179701852] [2022-07-22 12:53:33,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:33,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:33,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:33,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:33,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:33,722 INFO L87 Difference]: Start difference. First operand 36829 states and 41565 transitions. Second operand has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:36,200 INFO L93 Difference]: Finished difference Result 89878 states and 101625 transitions. [2022-07-22 12:53:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:36,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 436 [2022-07-22 12:53:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:36,259 INFO L225 Difference]: With dead ends: 89878 [2022-07-22 12:53:36,259 INFO L226 Difference]: Without dead ends: 53051 [2022-07-22 12:53:36,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:36,279 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 816 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:36,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 203 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2356 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 12:53:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53051 states. [2022-07-22 12:53:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53051 to 47506. [2022-07-22 12:53:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47506 states, 47505 states have (on average 1.1353331228291759) internal successors, (53934), 47505 states have internal predecessors, (53934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47506 states to 47506 states and 53934 transitions. [2022-07-22 12:53:36,828 INFO L78 Accepts]: Start accepts. Automaton has 47506 states and 53934 transitions. Word has length 436 [2022-07-22 12:53:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:36,828 INFO L495 AbstractCegarLoop]: Abstraction has 47506 states and 53934 transitions. [2022-07-22 12:53:36,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:36,829 INFO L276 IsEmpty]: Start isEmpty. Operand 47506 states and 53934 transitions. [2022-07-22 12:53:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-07-22 12:53:36,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:36,835 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:36,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 12:53:36,836 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:36,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:36,836 INFO L85 PathProgramCache]: Analyzing trace with hash 510641702, now seen corresponding path program 1 times [2022-07-22 12:53:36,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:36,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749925412] [2022-07-22 12:53:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:36,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 566 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-22 12:53:36,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:36,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749925412] [2022-07-22 12:53:36,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749925412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:36,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:36,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:36,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602931549] [2022-07-22 12:53:36,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:36,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:36,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:36,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:36,949 INFO L87 Difference]: Start difference. First operand 47506 states and 53934 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:38,885 INFO L93 Difference]: Finished difference Result 113738 states and 129584 transitions. [2022-07-22 12:53:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2022-07-22 12:53:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:38,960 INFO L225 Difference]: With dead ends: 113738 [2022-07-22 12:53:38,960 INFO L226 Difference]: Without dead ends: 66234 [2022-07-22 12:53:38,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:38,981 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 395 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:38,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 317 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:53:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66234 states. [2022-07-22 12:53:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66234 to 64943. [2022-07-22 12:53:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64943 states, 64942 states have (on average 1.1276985617936004) internal successors, (73235), 64942 states have internal predecessors, (73235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64943 states to 64943 states and 73235 transitions. [2022-07-22 12:53:39,864 INFO L78 Accepts]: Start accepts. Automaton has 64943 states and 73235 transitions. Word has length 455 [2022-07-22 12:53:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:39,864 INFO L495 AbstractCegarLoop]: Abstraction has 64943 states and 73235 transitions. [2022-07-22 12:53:39,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 64943 states and 73235 transitions. [2022-07-22 12:53:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-07-22 12:53:39,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:39,873 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:53:39,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:53:39,873 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash -526620874, now seen corresponding path program 1 times [2022-07-22 12:53:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:39,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560813206] [2022-07-22 12:53:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-22 12:53:40,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:40,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560813206] [2022-07-22 12:53:40,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560813206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:40,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:40,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:40,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127772555] [2022-07-22 12:53:40,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:40,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:40,073 INFO L87 Difference]: Start difference. First operand 64943 states and 73235 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:41,889 INFO L93 Difference]: Finished difference Result 143076 states and 160759 transitions. [2022-07-22 12:53:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 456 [2022-07-22 12:53:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:41,984 INFO L225 Difference]: With dead ends: 143076 [2022-07-22 12:53:41,985 INFO L226 Difference]: Without dead ends: 77710 [2022-07-22 12:53:42,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:42,007 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 368 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:42,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 811 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:53:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77710 states. [2022-07-22 12:53:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77710 to 75139. [2022-07-22 12:53:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75139 states, 75138 states have (on average 1.1158534962335969) internal successors, (83843), 75138 states have internal predecessors, (83843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75139 states to 75139 states and 83843 transitions. [2022-07-22 12:53:42,878 INFO L78 Accepts]: Start accepts. Automaton has 75139 states and 83843 transitions. Word has length 456 [2022-07-22 12:53:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:42,878 INFO L495 AbstractCegarLoop]: Abstraction has 75139 states and 83843 transitions. [2022-07-22 12:53:42,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 75139 states and 83843 transitions. [2022-07-22 12:53:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-07-22 12:53:42,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:42,887 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:53:42,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:53:42,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 102580086, now seen corresponding path program 1 times [2022-07-22 12:53:42,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:42,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373273326] [2022-07-22 12:53:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:42,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-22 12:53:43,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373273326] [2022-07-22 12:53:43,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373273326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:43,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:43,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:43,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393729326] [2022-07-22 12:53:43,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:43,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:43,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:43,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:43,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:43,197 INFO L87 Difference]: Start difference. First operand 75139 states and 83843 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:44,942 INFO L93 Difference]: Finished difference Result 159645 states and 178328 transitions. [2022-07-22 12:53:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 474 [2022-07-22 12:53:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:45,039 INFO L225 Difference]: With dead ends: 159645 [2022-07-22 12:53:45,039 INFO L226 Difference]: Without dead ends: 84508 [2022-07-22 12:53:45,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:45,074 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 339 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:45,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 764 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:53:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84508 states. [2022-07-22 12:53:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84508 to 75960. [2022-07-22 12:53:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75960 states, 75959 states have (on average 1.1049645203333378) internal successors, (83932), 75959 states have internal predecessors, (83932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75960 states to 75960 states and 83932 transitions. [2022-07-22 12:53:46,105 INFO L78 Accepts]: Start accepts. Automaton has 75960 states and 83932 transitions. Word has length 474 [2022-07-22 12:53:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:46,105 INFO L495 AbstractCegarLoop]: Abstraction has 75960 states and 83932 transitions. [2022-07-22 12:53:46,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 75960 states and 83932 transitions. [2022-07-22 12:53:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-07-22 12:53:46,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:46,114 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:53:46,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:53:46,115 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:46,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:46,115 INFO L85 PathProgramCache]: Analyzing trace with hash 984657420, now seen corresponding path program 1 times [2022-07-22 12:53:46,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:46,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175353860] [2022-07-22 12:53:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:46,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-22 12:53:46,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:46,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175353860] [2022-07-22 12:53:46,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175353860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:46,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:46,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:46,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51218730] [2022-07-22 12:53:46,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:46,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:46,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:46,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:46,259 INFO L87 Difference]: Start difference. First operand 75960 states and 83932 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:48,214 INFO L93 Difference]: Finished difference Result 167253 states and 184599 transitions. [2022-07-22 12:53:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 479 [2022-07-22 12:53:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:48,317 INFO L225 Difference]: With dead ends: 167253 [2022-07-22 12:53:48,317 INFO L226 Difference]: Without dead ends: 91295 [2022-07-22 12:53:48,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:48,368 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 291 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:48,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 815 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:53:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91295 states. [2022-07-22 12:53:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91295 to 90422. [2022-07-22 12:53:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90422 states, 90421 states have (on average 1.096393536899614) internal successors, (99137), 90421 states have internal predecessors, (99137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90422 states to 90422 states and 99137 transitions. [2022-07-22 12:53:49,599 INFO L78 Accepts]: Start accepts. Automaton has 90422 states and 99137 transitions. Word has length 479 [2022-07-22 12:53:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:49,599 INFO L495 AbstractCegarLoop]: Abstraction has 90422 states and 99137 transitions. [2022-07-22 12:53:49,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 90422 states and 99137 transitions. [2022-07-22 12:53:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-07-22 12:53:49,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:49,609 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:53:49,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 12:53:49,609 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:49,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1207529746, now seen corresponding path program 1 times [2022-07-22 12:53:49,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:49,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377611742] [2022-07-22 12:53:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:49,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-22 12:53:49,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:49,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377611742] [2022-07-22 12:53:49,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377611742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:49,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:49,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:49,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508017107] [2022-07-22 12:53:49,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:49,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:49,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:49,909 INFO L87 Difference]: Start difference. First operand 90422 states and 99137 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:51,890 INFO L93 Difference]: Finished difference Result 191937 states and 210688 transitions. [2022-07-22 12:53:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 479 [2022-07-22 12:53:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:52,023 INFO L225 Difference]: With dead ends: 191937 [2022-07-22 12:53:52,023 INFO L226 Difference]: Without dead ends: 101087 [2022-07-22 12:53:52,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:52,069 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 436 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:52,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 249 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:53:52,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101087 states. [2022-07-22 12:53:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101087 to 98082. [2022-07-22 12:53:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98082 states, 98081 states have (on average 1.0972665449985217) internal successors, (107621), 98081 states have internal predecessors, (107621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98082 states to 98082 states and 107621 transitions. [2022-07-22 12:53:53,430 INFO L78 Accepts]: Start accepts. Automaton has 98082 states and 107621 transitions. Word has length 479 [2022-07-22 12:53:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:53,430 INFO L495 AbstractCegarLoop]: Abstraction has 98082 states and 107621 transitions. [2022-07-22 12:53:53,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 98082 states and 107621 transitions. [2022-07-22 12:53:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-07-22 12:53:53,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:53,438 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:53,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 12:53:53,438 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1207972705, now seen corresponding path program 1 times [2022-07-22 12:53:53,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:53,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672980696] [2022-07-22 12:53:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:53,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-22 12:53:53,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:53,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672980696] [2022-07-22 12:53:53,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672980696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:53,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752292875] [2022-07-22 12:53:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:53,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:53,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:53,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:53:53,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:53:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:53:53,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-22 12:53:54,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:53:54,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752292875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:54,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:53:54,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 12:53:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877086801] [2022-07-22 12:53:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:54,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:54,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:53:54,002 INFO L87 Difference]: Start difference. First operand 98082 states and 107621 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:55,947 INFO L93 Difference]: Finished difference Result 195307 states and 214212 transitions. [2022-07-22 12:53:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:55,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 482 [2022-07-22 12:53:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:56,044 INFO L225 Difference]: With dead ends: 195307 [2022-07-22 12:53:56,044 INFO L226 Difference]: Without dead ends: 96798 [2022-07-22 12:53:56,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:53:56,064 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 439 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:56,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 329 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:53:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96798 states. [2022-07-22 12:53:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96798 to 90834. [2022-07-22 12:53:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90834 states, 90833 states have (on average 1.0878425241927494) internal successors, (98812), 90833 states have internal predecessors, (98812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90834 states to 90834 states and 98812 transitions. [2022-07-22 12:53:57,074 INFO L78 Accepts]: Start accepts. Automaton has 90834 states and 98812 transitions. Word has length 482 [2022-07-22 12:53:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:57,074 INFO L495 AbstractCegarLoop]: Abstraction has 90834 states and 98812 transitions. [2022-07-22 12:53:57,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 90834 states and 98812 transitions. [2022-07-22 12:53:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-22 12:53:57,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:57,084 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:53:57,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:53:57,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 12:53:57,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash 618495215, now seen corresponding path program 1 times [2022-07-22 12:53:57,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157745782] [2022-07-22 12:53:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:57,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 532 proven. 108 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:53:57,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:57,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157745782] [2022-07-22 12:53:57,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157745782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:57,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578917758] [2022-07-22 12:53:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:57,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:57,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:53:57,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:53:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:57,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 12:53:57,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 450 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-22 12:53:58,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:53:58,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578917758] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:58,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:53:58,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-22 12:53:58,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429102772] [2022-07-22 12:53:58,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:58,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:58,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:53:58,452 INFO L87 Difference]: Start difference. First operand 90834 states and 98812 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:54:00,440 INFO L93 Difference]: Finished difference Result 125000 states and 136353 transitions. [2022-07-22 12:54:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:54:00,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 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 513 [2022-07-22 12:54:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:54:00,577 INFO L225 Difference]: With dead ends: 125000 [2022-07-22 12:54:00,577 INFO L226 Difference]: Without dead ends: 124998 [2022-07-22 12:54:00,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:54:00,597 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 389 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 806 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:54:00,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 214 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1216 Invalid, 0 Unknown, 806 Unchecked, 1.5s Time] [2022-07-22 12:54:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124998 states. [2022-07-22 12:54:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124998 to 111347. [2022-07-22 12:54:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111347 states, 111346 states have (on average 1.091714116358019) internal successors, (121558), 111346 states have internal predecessors, (121558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111347 states to 111347 states and 121558 transitions. [2022-07-22 12:54:02,049 INFO L78 Accepts]: Start accepts. Automaton has 111347 states and 121558 transitions. Word has length 513 [2022-07-22 12:54:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:54:02,050 INFO L495 AbstractCegarLoop]: Abstraction has 111347 states and 121558 transitions. [2022-07-22 12:54:02,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 111347 states and 121558 transitions. [2022-07-22 12:54:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-07-22 12:54:02,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:54:02,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:54:02,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 12:54:02,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:54:02,277 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:54:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:54:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1842067513, now seen corresponding path program 1 times [2022-07-22 12:54:02,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:54:02,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524268974] [2022-07-22 12:54:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:54:02,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:54:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:54:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 336 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:54:02,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:54:02,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524268974] [2022-07-22 12:54:02,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524268974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:54:02,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357219433] [2022-07-22 12:54:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:54:02,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:54:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:54:02,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:54:02,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:54:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:54:02,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 12:54:02,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:54:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 254 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 12:54:02,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:54:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 254 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 12:54:03,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357219433] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:54:03,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:54:03,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-22 12:54:03,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329064998] [2022-07-22 12:54:03,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:54:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 12:54:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:54:03,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 12:54:03,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:54:03,761 INFO L87 Difference]: Start difference. First operand 111347 states and 121558 transitions. Second operand has 9 states, 9 states have (on average 134.33333333333334) internal successors, (1209), 9 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:54:16,738 INFO L93 Difference]: Finished difference Result 328886 states and 359909 transitions. [2022-07-22 12:54:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 12:54:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 134.33333333333334) internal successors, (1209), 9 states have internal predecessors, (1209), 0 states have call successors, (0), 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 527 [2022-07-22 12:54:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:54:17,018 INFO L225 Difference]: With dead ends: 328886 [2022-07-22 12:54:17,018 INFO L226 Difference]: Without dead ends: 217116 [2022-07-22 12:54:17,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-07-22 12:54:17,105 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 8320 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 13796 mSolverCounterSat, 2325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8320 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 16121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2325 IncrementalHoareTripleChecker+Valid, 13796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:54:17,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8320 Valid, 489 Invalid, 16121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2325 Valid, 13796 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-07-22 12:54:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217116 states. [2022-07-22 12:54:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217116 to 157792. [2022-07-22 12:54:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157792 states, 157791 states have (on average 1.0878440468721282) internal successors, (171652), 157791 states have internal predecessors, (171652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157792 states to 157792 states and 171652 transitions. [2022-07-22 12:54:19,307 INFO L78 Accepts]: Start accepts. Automaton has 157792 states and 171652 transitions. Word has length 527 [2022-07-22 12:54:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:54:19,307 INFO L495 AbstractCegarLoop]: Abstraction has 157792 states and 171652 transitions. [2022-07-22 12:54:19,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 134.33333333333334) internal successors, (1209), 9 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 157792 states and 171652 transitions. [2022-07-22 12:54:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-07-22 12:54:19,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:54:19,316 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:54:19,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 12:54:19,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:54:19,536 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:54:19,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:54:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash 69490722, now seen corresponding path program 1 times [2022-07-22 12:54:19,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:54:19,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52789424] [2022-07-22 12:54:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:54:19,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:54:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:54:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 613 proven. 141 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 12:54:19,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:54:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52789424] [2022-07-22 12:54:19,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52789424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:54:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615739758] [2022-07-22 12:54:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:54:19,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:54:19,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:54:19,696 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:54:19,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:54:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:54:19,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:54:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:54:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-07-22 12:54:20,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:54:20,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615739758] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:54:20,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:54:20,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 12:54:20,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513152915] [2022-07-22 12:54:20,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:54:20,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:54:20,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:54:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:54:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:54:20,492 INFO L87 Difference]: Start difference. First operand 157792 states and 171652 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 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) [2022-07-22 12:54:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:54:20,945 INFO L93 Difference]: Finished difference Result 157828 states and 171688 transitions. [2022-07-22 12:54:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:54:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 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 543 [2022-07-22 12:54:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:54:21,128 INFO L225 Difference]: With dead ends: 157828 [2022-07-22 12:54:21,128 INFO L226 Difference]: Without dead ends: 157826 [2022-07-22 12:54:21,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:54:21,170 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 730 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:54:21,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 813 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 730 Unchecked, 0.0s Time] [2022-07-22 12:54:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157826 states. [2022-07-22 12:54:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157826 to 157792. [2022-07-22 12:54:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157792 states, 157791 states have (on average 1.0878440468721282) internal successors, (171652), 157791 states have internal predecessors, (171652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157792 states to 157792 states and 171652 transitions. [2022-07-22 12:54:23,101 INFO L78 Accepts]: Start accepts. Automaton has 157792 states and 171652 transitions. Word has length 543 [2022-07-22 12:54:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:54:23,101 INFO L495 AbstractCegarLoop]: Abstraction has 157792 states and 171652 transitions. [2022-07-22 12:54:23,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 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) [2022-07-22 12:54:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand 157792 states and 171652 transitions. [2022-07-22 12:54:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-07-22 12:54:23,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:54:23,109 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:54:23,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 12:54:23,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:54:23,309 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:54:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:54:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash -762174023, now seen corresponding path program 1 times [2022-07-22 12:54:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:54:23,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862145140] [2022-07-22 12:54:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:54:23,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:54:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:54:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 274 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 12:54:23,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:54:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862145140] [2022-07-22 12:54:23,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862145140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:54:23,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476075003] [2022-07-22 12:54:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:54:23,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:54:23,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:54:23,505 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:54:23,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 12:54:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:54:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:54:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:54:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-07-22 12:54:24,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:54:24,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476075003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:54:24,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:54:24,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-22 12:54:24,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74269396] [2022-07-22 12:54:24,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:54:24,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:54:24,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:54:24,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:54:24,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:54:24,166 INFO L87 Difference]: Start difference. First operand 157792 states and 171652 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:54:24,622 INFO L93 Difference]: Finished difference Result 158219 states and 172079 transitions. [2022-07-22 12:54:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:54:24,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 547 [2022-07-22 12:54:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:54:24,789 INFO L225 Difference]: With dead ends: 158219 [2022-07-22 12:54:24,789 INFO L226 Difference]: Without dead ends: 157792