./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2018/Problem10.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-rers2018/Problem10.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 aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 13:14:43,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 13:14:43,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 13:14:43,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 13:14:43,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 13:14:43,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 13:14:43,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 13:14:43,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 13:14:43,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 13:14:43,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 13:14:43,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 13:14:43,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 13:14:43,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 13:14:43,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 13:14:43,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 13:14:43,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 13:14:43,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 13:14:43,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 13:14:43,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 13:14:43,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 13:14:43,711 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 13:14:43,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 13:14:43,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 13:14:43,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 13:14:43,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 13:14:43,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 13:14:43,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 13:14:43,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 13:14:43,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 13:14:43,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 13:14:43,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 13:14:43,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 13:14:43,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 13:14:43,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 13:14:43,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 13:14:43,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 13:14:43,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 13:14:43,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 13:14:43,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 13:14:43,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 13:14:43,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 13:14:43,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 13:14:43,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 13:14:43,756 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 13:14:43,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 13:14:43,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 13:14:43,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 13:14:43,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 13:14:43,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 13:14:43,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 13:14:43,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 13:14:43,759 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 13:14:43,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 13:14:43,760 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 13:14:43,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 13:14:43,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 13:14:43,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 13:14:43,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 13:14:43,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 13:14:43,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 13:14:43,761 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 13:14:43,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 13:14:43,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 13:14:43,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 13:14:43,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 13:14:43,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 13:14:43,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 13:14:43,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:14:43,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 13:14:43,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 13:14:43,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 13:14:43,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 13:14:43,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 13:14:43,764 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 13:14:43,764 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 13:14:43,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 13:14:43,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 [2022-07-22 13:14:43,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 13:14:43,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 13:14:43,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 13:14:43,968 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 13:14:43,969 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 13:14:43,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2018/Problem10.c [2022-07-22 13:14:44,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdaabed45/1141ba34e07d44dba492a109eb19cc9b/FLAGcdf102535 [2022-07-22 13:14:44,423 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 13:14:44,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem10.c [2022-07-22 13:14:44,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdaabed45/1141ba34e07d44dba492a109eb19cc9b/FLAGcdf102535 [2022-07-22 13:14:44,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdaabed45/1141ba34e07d44dba492a109eb19cc9b [2022-07-22 13:14:44,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 13:14:44,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 13:14:44,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 13:14:44,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 13:14:44,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 13:14:44,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:14:44" (1/1) ... [2022-07-22 13:14:44,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183169ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:44, skipping insertion in model container [2022-07-22 13:14:44,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:14:44" (1/1) ... [2022-07-22 13:14:44,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 13:14:44,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 13:14:44,631 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-rers2018/Problem10.c[778,791] [2022-07-22 13:14:44,634 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-rers2018/Problem10.c[817,830] [2022-07-22 13:14:44,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:14:44,919 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 13:14:44,927 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-rers2018/Problem10.c[778,791] [2022-07-22 13:14:44,929 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-rers2018/Problem10.c[817,830] [2022-07-22 13:14:44,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:14:45,025 INFO L208 MainTranslator]: Completed translation [2022-07-22 13:14:45,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45 WrapperNode [2022-07-22 13:14:45,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 13:14:45,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 13:14:45,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 13:14:45,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 13:14:45,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,109 INFO L137 Inliner]: procedures = 274, calls = 248, calls flagged for inlining = 144, calls inlined = 144, statements flattened = 865 [2022-07-22 13:14:45,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 13:14:45,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 13:14:45,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 13:14:45,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 13:14:45,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 13:14:45,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 13:14:45,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 13:14:45,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 13:14:45,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (1/1) ... [2022-07-22 13:14:45,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:14:45,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:14:45,228 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 13:14:45,233 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 13:14:45,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 13:14:45,262 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-07-22 13:14:45,262 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-07-22 13:14:45,262 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-07-22 13:14:45,263 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-07-22 13:14:45,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 13:14:45,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 13:14:45,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 13:14:45,381 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 13:14:45,382 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 13:14:46,163 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 13:14:46,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 13:14:46,176 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 13:14:46,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:14:46 BoogieIcfgContainer [2022-07-22 13:14:46,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 13:14:46,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 13:14:46,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 13:14:46,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 13:14:46,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 01:14:44" (1/3) ... [2022-07-22 13:14:46,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28db250f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:14:46, skipping insertion in model container [2022-07-22 13:14:46,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:14:45" (2/3) ... [2022-07-22 13:14:46,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28db250f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:14:46, skipping insertion in model container [2022-07-22 13:14:46,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:14:46" (3/3) ... [2022-07-22 13:14:46,185 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10.c [2022-07-22 13:14:46,195 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 13:14:46,196 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 13:14:46,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 13:14:46,260 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@7015000d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@22836882 [2022-07-22 13:14:46,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 13:14:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-07-22 13:14:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 13:14:46,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:46,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:46,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1184212657, now seen corresponding path program 1 times [2022-07-22 13:14:46,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:46,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526779554] [2022-07-22 13:14:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:46,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:46,472 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 13:14:46,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:46,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526779554] [2022-07-22 13:14:46,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526779554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:46,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:46,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351411689] [2022-07-22 13:14:46,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:46,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:14:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:14:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:14:46,509 INFO L87 Difference]: Start difference. First operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:47,577 INFO L93 Difference]: Finished difference Result 1165 states and 2069 transitions. [2022-07-22 13:14:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:14:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 13:14:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:47,591 INFO L225 Difference]: With dead ends: 1165 [2022-07-22 13:14:47,592 INFO L226 Difference]: Without dead ends: 690 [2022-07-22 13:14:47,598 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 13:14:47,600 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 373 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:47,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 772 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 13:14:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-07-22 13:14:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 557. [2022-07-22 13:14:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 455 states have (on average 1.589010989010989) internal successors, (723), 554 states have internal predecessors, (723), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 823 transitions. [2022-07-22 13:14:47,657 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 823 transitions. Word has length 13 [2022-07-22 13:14:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:47,657 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 823 transitions. [2022-07-22 13:14:47,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 823 transitions. [2022-07-22 13:14:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 13:14:47,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:47,659 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] [2022-07-22 13:14:47,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 13:14:47,659 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash -249172658, now seen corresponding path program 1 times [2022-07-22 13:14:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552418058] [2022-07-22 13:14:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:47,705 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 13:14:47,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:47,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552418058] [2022-07-22 13:14:47,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552418058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:47,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:47,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656891582] [2022-07-22 13:14:47,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:47,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:14:47,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:47,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:14:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:14:47,708 INFO L87 Difference]: Start difference. First operand 557 states and 823 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:48,315 INFO L93 Difference]: Finished difference Result 1704 states and 2582 transitions. [2022-07-22 13:14:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:14:48,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-22 13:14:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:48,323 INFO L225 Difference]: With dead ends: 1704 [2022-07-22 13:14:48,323 INFO L226 Difference]: Without dead ends: 1149 [2022-07-22 13:14:48,327 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 13:14:48,328 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 845 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:48,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 1116 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 13:14:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-07-22 13:14:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 888. [2022-07-22 13:14:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 786 states have (on average 1.5521628498727735) internal successors, (1220), 885 states have internal predecessors, (1220), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1320 transitions. [2022-07-22 13:14:48,388 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1320 transitions. Word has length 21 [2022-07-22 13:14:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:48,390 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1320 transitions. [2022-07-22 13:14:48,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1320 transitions. [2022-07-22 13:14:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 13:14:48,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:48,395 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] [2022-07-22 13:14:48,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 13:14:48,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:48,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1086962958, now seen corresponding path program 1 times [2022-07-22 13:14:48,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:48,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361589709] [2022-07-22 13:14:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:48,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:48,467 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 13:14:48,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361589709] [2022-07-22 13:14:48,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361589709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:48,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:48,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:48,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721610926] [2022-07-22 13:14:48,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:48,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:48,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:48,470 INFO L87 Difference]: Start difference. First operand 888 states and 1320 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:48,500 INFO L93 Difference]: Finished difference Result 2645 states and 3935 transitions. [2022-07-22 13:14:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-22 13:14:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:48,505 INFO L225 Difference]: With dead ends: 2645 [2022-07-22 13:14:48,505 INFO L226 Difference]: Without dead ends: 1759 [2022-07-22 13:14:48,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 13:14:48,512 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 461 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:48,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1255 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:14:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-07-22 13:14:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 888. [2022-07-22 13:14:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 786 states have (on average 1.5508905852417303) internal successors, (1219), 885 states have internal predecessors, (1219), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1319 transitions. [2022-07-22 13:14:48,534 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1319 transitions. Word has length 24 [2022-07-22 13:14:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:48,534 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1319 transitions. [2022-07-22 13:14:48,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1319 transitions. [2022-07-22 13:14:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 13:14:48,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:48,535 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] [2022-07-22 13:14:48,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 13:14:48,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1345128396, now seen corresponding path program 1 times [2022-07-22 13:14:48,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:48,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291450741] [2022-07-22 13:14:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:48,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:48,563 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 13:14:48,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:48,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291450741] [2022-07-22 13:14:48,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291450741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:48,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:48,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:48,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218686076] [2022-07-22 13:14:48,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:48,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:48,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:48,566 INFO L87 Difference]: Start difference. First operand 888 states and 1319 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:48,699 INFO L93 Difference]: Finished difference Result 2201 states and 3265 transitions. [2022-07-22 13:14:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:48,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-22 13:14:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:48,704 INFO L225 Difference]: With dead ends: 2201 [2022-07-22 13:14:48,704 INFO L226 Difference]: Without dead ends: 1315 [2022-07-22 13:14:48,706 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 13:14:48,712 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 533 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:48,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1382 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 13:14:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-07-22 13:14:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1231. [2022-07-22 13:14:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1129 states have (on average 1.5491585473870682) internal successors, (1749), 1228 states have internal predecessors, (1749), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1849 transitions. [2022-07-22 13:14:48,744 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1849 transitions. Word has length 24 [2022-07-22 13:14:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:48,744 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1849 transitions. [2022-07-22 13:14:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1849 transitions. [2022-07-22 13:14:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 13:14:48,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:48,745 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] [2022-07-22 13:14:48,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 13:14:48,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash 500156944, now seen corresponding path program 1 times [2022-07-22 13:14:48,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:48,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51060862] [2022-07-22 13:14:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:48,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:48,799 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 13:14:48,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:48,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51060862] [2022-07-22 13:14:48,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51060862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:48,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:48,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222140979] [2022-07-22 13:14:48,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:48,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:48,802 INFO L87 Difference]: Start difference. First operand 1231 states and 1849 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:49,222 INFO L93 Difference]: Finished difference Result 3169 states and 4832 transitions. [2022-07-22 13:14:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-22 13:14:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:49,228 INFO L225 Difference]: With dead ends: 3169 [2022-07-22 13:14:49,229 INFO L226 Difference]: Without dead ends: 1940 [2022-07-22 13:14:49,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 13:14:49,231 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 310 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:49,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 801 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 13:14:49,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-07-22 13:14:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1397. [2022-07-22 13:14:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1295 states have (on average 1.4517374517374517) internal successors, (1880), 1394 states have internal predecessors, (1880), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1980 transitions. [2022-07-22 13:14:49,262 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1980 transitions. Word has length 24 [2022-07-22 13:14:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:49,263 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1980 transitions. [2022-07-22 13:14:49,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1980 transitions. [2022-07-22 13:14:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 13:14:49,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:49,265 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] [2022-07-22 13:14:49,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 13:14:49,266 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:49,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:49,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1201221522, now seen corresponding path program 1 times [2022-07-22 13:14:49,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:49,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227986037] [2022-07-22 13:14:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:49,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:49,312 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 13:14:49,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:49,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227986037] [2022-07-22 13:14:49,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227986037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:49,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:49,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:14:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206426380] [2022-07-22 13:14:49,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:49,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:49,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:49,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:49,315 INFO L87 Difference]: Start difference. First operand 1397 states and 1980 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:49,395 INFO L93 Difference]: Finished difference Result 4140 states and 5880 transitions. [2022-07-22 13:14:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-22 13:14:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:49,405 INFO L225 Difference]: With dead ends: 4140 [2022-07-22 13:14:49,405 INFO L226 Difference]: Without dead ends: 2745 [2022-07-22 13:14:49,409 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 13:14:49,410 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 510 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:49,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1073 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:14:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-07-22 13:14:49,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2657. [2022-07-22 13:14:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2555 states have (on average 1.4348336594911937) internal successors, (3666), 2654 states have internal predecessors, (3666), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3766 transitions. [2022-07-22 13:14:49,457 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3766 transitions. Word has length 24 [2022-07-22 13:14:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:49,457 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 3766 transitions. [2022-07-22 13:14:49,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3766 transitions. [2022-07-22 13:14:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 13:14:49,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:49,458 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] [2022-07-22 13:14:49,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 13:14:49,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1417555436, now seen corresponding path program 1 times [2022-07-22 13:14:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:49,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542952996] [2022-07-22 13:14:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:49,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:49,493 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 13:14:49,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:49,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542952996] [2022-07-22 13:14:49,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542952996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:49,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:49,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:49,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834304346] [2022-07-22 13:14:49,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:49,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:49,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:49,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:49,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:49,511 INFO L87 Difference]: Start difference. First operand 2657 states and 3766 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:49,913 INFO L93 Difference]: Finished difference Result 6143 states and 8908 transitions. [2022-07-22 13:14:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 13:14:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:49,923 INFO L225 Difference]: With dead ends: 6143 [2022-07-22 13:14:49,924 INFO L226 Difference]: Without dead ends: 3488 [2022-07-22 13:14:49,927 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 13:14:49,928 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 230 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:49,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 722 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 13:14:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-07-22 13:14:49,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3484. [2022-07-22 13:14:49,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3382 states have (on average 1.3746303962152573) internal successors, (4649), 3481 states have internal predecessors, (4649), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 4749 transitions. [2022-07-22 13:14:49,999 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 4749 transitions. Word has length 25 [2022-07-22 13:14:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:50,001 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 4749 transitions. [2022-07-22 13:14:50,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 4749 transitions. [2022-07-22 13:14:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 13:14:50,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:50,002 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] [2022-07-22 13:14:50,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 13:14:50,003 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:50,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2032440408, now seen corresponding path program 1 times [2022-07-22 13:14:50,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:50,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648383414] [2022-07-22 13:14:50,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:50,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:50,041 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 13:14:50,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648383414] [2022-07-22 13:14:50,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648383414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:50,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:50,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:50,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436911702] [2022-07-22 13:14:50,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:50,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:50,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:50,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:50,044 INFO L87 Difference]: Start difference. First operand 3484 states and 4749 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:50,484 INFO L93 Difference]: Finished difference Result 7813 states and 10890 transitions. [2022-07-22 13:14:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 13:14:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:50,497 INFO L225 Difference]: With dead ends: 7813 [2022-07-22 13:14:50,497 INFO L226 Difference]: Without dead ends: 4331 [2022-07-22 13:14:50,502 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 13:14:50,503 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 299 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:50,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 682 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 13:14:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2022-07-22 13:14:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4327. [2022-07-22 13:14:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4327 states, 4225 states have (on average 1.353846153846154) internal successors, (5720), 4324 states have internal predecessors, (5720), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 5820 transitions. [2022-07-22 13:14:50,570 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 5820 transitions. Word has length 25 [2022-07-22 13:14:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:50,570 INFO L495 AbstractCegarLoop]: Abstraction has 4327 states and 5820 transitions. [2022-07-22 13:14:50,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 5820 transitions. [2022-07-22 13:14:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 13:14:50,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:50,571 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] [2022-07-22 13:14:50,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 13:14:50,571 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:50,572 INFO L85 PathProgramCache]: Analyzing trace with hash -995255721, now seen corresponding path program 1 times [2022-07-22 13:14:50,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:50,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195849723] [2022-07-22 13:14:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:50,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:50,590 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 13:14:50,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:50,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195849723] [2022-07-22 13:14:50,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195849723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:50,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:50,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:50,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910455529] [2022-07-22 13:14:50,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:50,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:50,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:50,592 INFO L87 Difference]: Start difference. First operand 4327 states and 5820 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:50,652 INFO L93 Difference]: Finished difference Result 8549 states and 11509 transitions. [2022-07-22 13:14:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:50,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-22 13:14:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:50,676 INFO L225 Difference]: With dead ends: 8549 [2022-07-22 13:14:50,676 INFO L226 Difference]: Without dead ends: 8542 [2022-07-22 13:14:50,680 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 13:14:50,681 INFO L413 NwaCegarLoop]: 1005 mSDtfsCounter, 548 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:50,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1555 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:14:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8542 states. [2022-07-22 13:14:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8542 to 8441. [2022-07-22 13:14:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8441 states, 8339 states have (on average 1.3492025422712555) internal successors, (11251), 8438 states have internal predecessors, (11251), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8441 states to 8441 states and 11351 transitions. [2022-07-22 13:14:50,839 INFO L78 Accepts]: Start accepts. Automaton has 8441 states and 11351 transitions. Word has length 26 [2022-07-22 13:14:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:50,839 INFO L495 AbstractCegarLoop]: Abstraction has 8441 states and 11351 transitions. [2022-07-22 13:14:50,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 8441 states and 11351 transitions. [2022-07-22 13:14:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 13:14:50,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:50,840 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] [2022-07-22 13:14:50,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 13:14:50,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:50,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1419566957, now seen corresponding path program 1 times [2022-07-22 13:14:50,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:50,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908892405] [2022-07-22 13:14:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:50,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:50,859 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 13:14:50,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:50,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908892405] [2022-07-22 13:14:50,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908892405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:50,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:50,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:14:50,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599859451] [2022-07-22 13:14:50,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:50,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:50,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:50,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:50,862 INFO L87 Difference]: Start difference. First operand 8441 states and 11351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:50,941 INFO L93 Difference]: Finished difference Result 16979 states and 22797 transitions. [2022-07-22 13:14:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-22 13:14:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:50,959 INFO L225 Difference]: With dead ends: 16979 [2022-07-22 13:14:50,959 INFO L226 Difference]: Without dead ends: 8540 [2022-07-22 13:14:50,971 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 13:14:50,972 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 533 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:50,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1209 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:14:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2022-07-22 13:14:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 8439. [2022-07-22 13:14:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8439 states, 8339 states have (on average 1.3441659671423432) internal successors, (11209), 8436 states have internal predecessors, (11209), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8439 states to 8439 states and 11307 transitions. [2022-07-22 13:14:51,148 INFO L78 Accepts]: Start accepts. Automaton has 8439 states and 11307 transitions. Word has length 26 [2022-07-22 13:14:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:51,148 INFO L495 AbstractCegarLoop]: Abstraction has 8439 states and 11307 transitions. [2022-07-22 13:14:51,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8439 states and 11307 transitions. [2022-07-22 13:14:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 13:14:51,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:51,149 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] [2022-07-22 13:14:51,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 13:14:51,150 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1314457887, now seen corresponding path program 1 times [2022-07-22 13:14:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:51,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795035165] [2022-07-22 13:14:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:51,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:51,167 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 13:14:51,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:51,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795035165] [2022-07-22 13:14:51,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795035165] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:51,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:51,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:14:51,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472149842] [2022-07-22 13:14:51,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:51,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:51,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:51,169 INFO L87 Difference]: Start difference. First operand 8439 states and 11307 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:51,345 INFO L93 Difference]: Finished difference Result 25142 states and 33722 transitions. [2022-07-22 13:14:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 13:14:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:51,375 INFO L225 Difference]: With dead ends: 25142 [2022-07-22 13:14:51,376 INFO L226 Difference]: Without dead ends: 16705 [2022-07-22 13:14:51,386 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 13:14:51,386 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 526 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:51,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1108 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:14:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16705 states. [2022-07-22 13:14:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16705 to 16607. [2022-07-22 13:14:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16607 states, 16507 states have (on average 1.3390076937057007) internal successors, (22103), 16604 states have internal predecessors, (22103), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16607 states to 16607 states and 22201 transitions. [2022-07-22 13:14:51,648 INFO L78 Accepts]: Start accepts. Automaton has 16607 states and 22201 transitions. Word has length 28 [2022-07-22 13:14:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:51,649 INFO L495 AbstractCegarLoop]: Abstraction has 16607 states and 22201 transitions. [2022-07-22 13:14:51,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 16607 states and 22201 transitions. [2022-07-22 13:14:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 13:14:51,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:51,651 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] [2022-07-22 13:14:51,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 13:14:51,651 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1594983404, now seen corresponding path program 1 times [2022-07-22 13:14:51,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:51,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924141122] [2022-07-22 13:14:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:51,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:51,683 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 13:14:51,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:51,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924141122] [2022-07-22 13:14:51,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924141122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:51,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:51,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:51,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561561997] [2022-07-22 13:14:51,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:51,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:51,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:51,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:51,685 INFO L87 Difference]: Start difference. First operand 16607 states and 22201 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:51,962 INFO L93 Difference]: Finished difference Result 48238 states and 64732 transitions. [2022-07-22 13:14:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:51,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-22 13:14:51,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:52,016 INFO L225 Difference]: With dead ends: 48238 [2022-07-22 13:14:52,016 INFO L226 Difference]: Without dead ends: 31633 [2022-07-22 13:14:52,038 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 13:14:52,039 INFO L413 NwaCegarLoop]: 858 mSDtfsCounter, 504 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:52,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 1352 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 13:14:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31633 states. [2022-07-22 13:14:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31633 to 31544. [2022-07-22 13:14:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31544 states, 31444 states have (on average 1.3317644065640504) internal successors, (41876), 31541 states have internal predecessors, (41876), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31544 states to 31544 states and 41974 transitions. [2022-07-22 13:14:52,479 INFO L78 Accepts]: Start accepts. Automaton has 31544 states and 41974 transitions. Word has length 33 [2022-07-22 13:14:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:52,479 INFO L495 AbstractCegarLoop]: Abstraction has 31544 states and 41974 transitions. [2022-07-22 13:14:52,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 31544 states and 41974 transitions. [2022-07-22 13:14:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 13:14:52,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:52,480 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] [2022-07-22 13:14:52,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 13:14:52,480 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:52,481 INFO L85 PathProgramCache]: Analyzing trace with hash 132362279, now seen corresponding path program 1 times [2022-07-22 13:14:52,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:52,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801813567] [2022-07-22 13:14:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:52,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:52,496 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 13:14:52,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:52,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801813567] [2022-07-22 13:14:52,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801813567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:52,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:52,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:52,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036580297] [2022-07-22 13:14:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:52,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:52,498 INFO L87 Difference]: Start difference. First operand 31544 states and 41974 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:52,882 INFO L93 Difference]: Finished difference Result 73175 states and 97409 transitions. [2022-07-22 13:14:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-22 13:14:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:52,957 INFO L225 Difference]: With dead ends: 73175 [2022-07-22 13:14:52,958 INFO L226 Difference]: Without dead ends: 41633 [2022-07-22 13:14:52,996 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 13:14:52,997 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 483 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:52,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 965 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 13:14:53,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41633 states. [2022-07-22 13:14:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41633 to 41551. [2022-07-22 13:14:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41551 states, 41451 states have (on average 1.3153603049383609) internal successors, (54523), 41548 states have internal predecessors, (54523), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41551 states to 41551 states and 54621 transitions. [2022-07-22 13:14:53,652 INFO L78 Accepts]: Start accepts. Automaton has 41551 states and 54621 transitions. Word has length 34 [2022-07-22 13:14:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:53,653 INFO L495 AbstractCegarLoop]: Abstraction has 41551 states and 54621 transitions. [2022-07-22 13:14:53,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 41551 states and 54621 transitions. [2022-07-22 13:14:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 13:14:53,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:53,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:53,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 13:14:53,655 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash -209128006, now seen corresponding path program 1 times [2022-07-22 13:14:53,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:53,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253709314] [2022-07-22 13:14:53,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:53,676 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 13:14:53,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:53,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253709314] [2022-07-22 13:14:53,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253709314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:53,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:53,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:53,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212449378] [2022-07-22 13:14:53,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:53,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:53,678 INFO L87 Difference]: Start difference. First operand 41551 states and 54621 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:54,151 INFO L93 Difference]: Finished difference Result 105458 states and 138388 transitions. [2022-07-22 13:14:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:54,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-22 13:14:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:54,247 INFO L225 Difference]: With dead ends: 105458 [2022-07-22 13:14:54,247 INFO L226 Difference]: Without dead ends: 63909 [2022-07-22 13:14:54,278 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 13:14:54,278 INFO L413 NwaCegarLoop]: 980 mSDtfsCounter, 440 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:54,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1445 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 13:14:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63909 states. [2022-07-22 13:14:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63909 to 59950. [2022-07-22 13:14:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59950 states, 59850 states have (on average 1.2822222222222222) internal successors, (76741), 59947 states have internal predecessors, (76741), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59950 states to 59950 states and 76839 transitions. [2022-07-22 13:14:55,184 INFO L78 Accepts]: Start accepts. Automaton has 59950 states and 76839 transitions. Word has length 40 [2022-07-22 13:14:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:55,184 INFO L495 AbstractCegarLoop]: Abstraction has 59950 states and 76839 transitions. [2022-07-22 13:14:55,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 59950 states and 76839 transitions. [2022-07-22 13:14:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 13:14:55,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:55,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:55,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 13:14:55,185 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:55,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1653138166, now seen corresponding path program 1 times [2022-07-22 13:14:55,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:55,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712084098] [2022-07-22 13:14:55,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:55,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:55,218 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 13:14:55,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:55,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712084098] [2022-07-22 13:14:55,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712084098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:55,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:55,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:14:55,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035498985] [2022-07-22 13:14:55,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:55,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:55,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:55,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:55,220 INFO L87 Difference]: Start difference. First operand 59950 states and 76839 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:55,868 INFO L93 Difference]: Finished difference Result 157117 states and 202813 transitions. [2022-07-22 13:14:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-22 13:14:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:56,105 INFO L225 Difference]: With dead ends: 157117 [2022-07-22 13:14:56,105 INFO L226 Difference]: Without dead ends: 97169 [2022-07-22 13:14:56,134 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 13:14:56,134 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 450 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:56,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 984 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 13:14:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97169 states. [2022-07-22 13:14:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97169 to 97090. [2022-07-22 13:14:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97090 states, 96990 states have (on average 1.274615939787607) internal successors, (123625), 97087 states have internal predecessors, (123625), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97090 states to 97090 states and 123723 transitions. [2022-07-22 13:14:57,487 INFO L78 Accepts]: Start accepts. Automaton has 97090 states and 123723 transitions. Word has length 40 [2022-07-22 13:14:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:57,495 INFO L495 AbstractCegarLoop]: Abstraction has 97090 states and 123723 transitions. [2022-07-22 13:14:57,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:57,496 INFO L276 IsEmpty]: Start isEmpty. Operand 97090 states and 123723 transitions. [2022-07-22 13:14:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 13:14:57,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:57,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:57,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 13:14:57,496 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:57,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1240470838, now seen corresponding path program 1 times [2022-07-22 13:14:57,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:57,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309786083] [2022-07-22 13:14:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:57,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:57,556 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 13:14:57,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309786083] [2022-07-22 13:14:57,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309786083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:57,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:57,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:14:57,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996056771] [2022-07-22 13:14:57,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:57,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:57,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:14:57,559 INFO L87 Difference]: Start difference. First operand 97090 states and 123723 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:58,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:58,169 INFO L93 Difference]: Finished difference Result 174054 states and 221151 transitions. [2022-07-22 13:14:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:58,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-22 13:14:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:58,376 INFO L225 Difference]: With dead ends: 174054 [2022-07-22 13:14:58,376 INFO L226 Difference]: Without dead ends: 174051 [2022-07-22 13:14:58,396 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 13:14:58,397 INFO L413 NwaCegarLoop]: 1036 mSDtfsCounter, 527 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:58,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1576 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:14:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174051 states. [2022-07-22 13:15:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174051 to 173830. [2022-07-22 13:15:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173830 states, 173730 states have (on average 1.269723133598112) internal successors, (220589), 173827 states have internal predecessors, (220589), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173830 states to 173830 states and 220687 transitions. [2022-07-22 13:15:00,498 INFO L78 Accepts]: Start accepts. Automaton has 173830 states and 220687 transitions. Word has length 45 [2022-07-22 13:15:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:15:00,498 INFO L495 AbstractCegarLoop]: Abstraction has 173830 states and 220687 transitions. [2022-07-22 13:15:00,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 173830 states and 220687 transitions. [2022-07-22 13:15:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 13:15:00,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:15:00,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:15:00,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 13:15:00,499 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:15:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:15:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1976305641, now seen corresponding path program 1 times [2022-07-22 13:15:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:15:00,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151593317] [2022-07-22 13:15:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:15:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:15:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:15:00,535 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 13:15:00,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:15:00,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151593317] [2022-07-22 13:15:00,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151593317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:15:00,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:15:00,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:15:00,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571111451] [2022-07-22 13:15:00,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:15:00,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:15:00,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:15:00,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:15:00,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:15:00,538 INFO L87 Difference]: Start difference. First operand 173830 states and 220687 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:15:02,678 INFO L93 Difference]: Finished difference Result 454683 states and 576582 transitions. [2022-07-22 13:15:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:15:02,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-22 13:15:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:15:03,096 INFO L225 Difference]: With dead ends: 454683 [2022-07-22 13:15:03,096 INFO L226 Difference]: Without dead ends: 280855 [2022-07-22 13:15:03,170 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 13:15:03,171 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 695 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 13:15:03,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 725 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 13:15:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280855 states. [2022-07-22 13:15:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280855 to 173825. [2022-07-22 13:15:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173825 states, 173730 states have (on average 1.2597075922408334) internal successors, (218849), 173822 states have internal predecessors, (218849), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173825 states to 173825 states and 218942 transitions. [2022-07-22 13:15:05,976 INFO L78 Accepts]: Start accepts. Automaton has 173825 states and 218942 transitions. Word has length 48 [2022-07-22 13:15:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:15:05,976 INFO L495 AbstractCegarLoop]: Abstraction has 173825 states and 218942 transitions. [2022-07-22 13:15:05,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 173825 states and 218942 transitions. [2022-07-22 13:15:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 13:15:05,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:15:05,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:15:05,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 13:15:05,978 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:15:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:15:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash 951319779, now seen corresponding path program 1 times [2022-07-22 13:15:05,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:15:05,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461845556] [2022-07-22 13:15:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:15:05,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:15:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:15:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:15:05,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:15:06,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461845556] [2022-07-22 13:15:06,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461845556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:15:06,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:15:06,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:15:06,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293129089] [2022-07-22 13:15:06,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:15:06,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:15:06,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:15:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:15:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:15:06,001 INFO L87 Difference]: Start difference. First operand 173825 states and 218942 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:15:07,437 INFO L93 Difference]: Finished difference Result 343392 states and 432799 transitions. [2022-07-22 13:15:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:15:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-22 13:15:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:15:07,673 INFO L225 Difference]: With dead ends: 343392 [2022-07-22 13:15:07,673 INFO L226 Difference]: Without dead ends: 169569 [2022-07-22 13:15:07,766 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 13:15:07,767 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 389 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 13:15:07,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 361 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 13:15:07,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169569 states. [2022-07-22 13:15:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169569 to 89809. [2022-07-22 13:15:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89809 states, 89714 states have (on average 1.2017299418151013) internal successors, (107812), 89806 states have internal predecessors, (107812), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89809 states to 89809 states and 107905 transitions. [2022-07-22 13:15:09,426 INFO L78 Accepts]: Start accepts. Automaton has 89809 states and 107905 transitions. Word has length 58 [2022-07-22 13:15:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:15:09,427 INFO L495 AbstractCegarLoop]: Abstraction has 89809 states and 107905 transitions. [2022-07-22 13:15:09,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 89809 states and 107905 transitions. [2022-07-22 13:15:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 13:15:09,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:15:09,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:15:09,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 13:15:09,429 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:15:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:15:09,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1754865588, now seen corresponding path program 1 times [2022-07-22 13:15:09,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:15:09,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779287914] [2022-07-22 13:15:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:15:09,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:15:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:15:09,479 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 13:15:09,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:15:09,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779287914] [2022-07-22 13:15:09,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779287914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:15:09,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:15:09,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:15:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463989571] [2022-07-22 13:15:09,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:15:09,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:15:09,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:15:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:15:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:15:09,483 INFO L87 Difference]: Start difference. First operand 89809 states and 107905 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:15:10,178 INFO L93 Difference]: Finished difference Result 128298 states and 153371 transitions. [2022-07-22 13:15:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:15:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-22 13:15:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:15:10,340 INFO L225 Difference]: With dead ends: 128298 [2022-07-22 13:15:10,340 INFO L226 Difference]: Without dead ends: 128293 [2022-07-22 13:15:10,382 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 13:15:10,383 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 445 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:15:10,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1264 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:15:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128293 states. [2022-07-22 13:15:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128293 to 128079. [2022-07-22 13:15:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128079 states, 127984 states have (on average 1.1906722715339417) internal successors, (152387), 128076 states have internal predecessors, (152387), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128079 states to 128079 states and 152480 transitions. [2022-07-22 13:15:12,201 INFO L78 Accepts]: Start accepts. Automaton has 128079 states and 152480 transitions. Word has length 113 [2022-07-22 13:15:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:15:12,202 INFO L495 AbstractCegarLoop]: Abstraction has 128079 states and 152480 transitions. [2022-07-22 13:15:12,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 128079 states and 152480 transitions. [2022-07-22 13:15:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-22 13:15:12,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:15:12,206 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 13:15:12,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 13:15:12,206 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:15:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:15:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash 149557454, now seen corresponding path program 1 times [2022-07-22 13:15:12,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:15:12,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229952707] [2022-07-22 13:15:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:15:12,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:15:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:15:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 13:15:12,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:15:12,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229952707] [2022-07-22 13:15:12,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229952707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:15:12,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:15:12,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:15:12,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984852819] [2022-07-22 13:15:12,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:15:12,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:15:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:15:12,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:15:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:15:12,288 INFO L87 Difference]: Start difference. First operand 128079 states and 152480 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:15:13,248 INFO L93 Difference]: Finished difference Result 275491 states and 332198 transitions. [2022-07-22 13:15:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:15:13,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-22 13:15:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:15:13,448 INFO L225 Difference]: With dead ends: 275491 [2022-07-22 13:15:13,448 INFO L226 Difference]: Without dead ends: 147535 [2022-07-22 13:15:13,906 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 13:15:13,906 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 323 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 13:15:13,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 518 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 13:15:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147535 states. [2022-07-22 13:15:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147535 to 147227. [2022-07-22 13:15:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147227 states, 147132 states have (on average 1.1926773237636952) internal successors, (175481), 147224 states have internal predecessors, (175481), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147227 states to 147227 states and 175574 transitions. [2022-07-22 13:15:15,683 INFO L78 Accepts]: Start accepts. Automaton has 147227 states and 175574 transitions. Word has length 144 [2022-07-22 13:15:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:15:15,683 INFO L495 AbstractCegarLoop]: Abstraction has 147227 states and 175574 transitions. [2022-07-22 13:15:15,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 147227 states and 175574 transitions. [2022-07-22 13:15:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-22 13:15:15,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:15:15,689 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 13:15:15,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 13:15:15,689 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:15:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:15:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1572407842, now seen corresponding path program 1 times [2022-07-22 13:15:15,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:15:15,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742167885] [2022-07-22 13:15:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:15:15,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:15:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:15:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 13:15:15,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:15:15,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742167885] [2022-07-22 13:15:15,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742167885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:15:15,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:15:15,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:15:15,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549496899] [2022-07-22 13:15:15,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:15:15,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:15:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:15:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:15:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:15:15,765 INFO L87 Difference]: Start difference. First operand 147227 states and 175574 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:15:17,425 INFO L93 Difference]: Finished difference Result 424126 states and 506087 transitions. [2022-07-22 13:15:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:15:17,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-07-22 13:15:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:15:17,828 INFO L225 Difference]: With dead ends: 424126 [2022-07-22 13:15:17,828 INFO L226 Difference]: Without dead ends: 277022 [2022-07-22 13:15:18,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 13:15:18,325 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 513 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 13:15:18,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 916 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 13:15:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277022 states. [2022-07-22 13:15:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277022 to 276834. [2022-07-22 13:15:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276834 states, 276739 states have (on average 1.1910030750996425) internal successors, (329597), 276831 states have internal predecessors, (329597), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276834 states to 276834 states and 329690 transitions. [2022-07-22 13:15:22,044 INFO L78 Accepts]: Start accepts. Automaton has 276834 states and 329690 transitions. Word has length 146 [2022-07-22 13:15:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:15:22,045 INFO L495 AbstractCegarLoop]: Abstraction has 276834 states and 329690 transitions. [2022-07-22 13:15:22,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 276834 states and 329690 transitions. [2022-07-22 13:15:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 13:15:22,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:15:22,048 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 13:15:22,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 13:15:22,048 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:15:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:15:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -768181585, now seen corresponding path program 1 times [2022-07-22 13:15:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:15:22,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062658258] [2022-07-22 13:15:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:15:22,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:15:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:15:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:15:22,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:15:22,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062658258] [2022-07-22 13:15:22,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062658258] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:15:22,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:15:22,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 13:15:22,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778707791] [2022-07-22 13:15:22,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:15:22,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:15:22,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:15:22,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:15:22,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:15:22,219 INFO L87 Difference]: Start difference. First operand 276834 states and 329690 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)