./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/systemc/token_ring.07.cil-2.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 32b030e5f1b46150870f8dd8e24821389f0ffe4175e43053767dc9109bffcf9b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:04:03,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:04:03,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:04:03,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:04:03,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:04:03,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:04:03,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:04:03,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:04:03,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:04:03,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:04:03,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:04:03,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:04:03,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:04:03,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:04:03,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:04:03,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:04:03,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:04:03,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:04:03,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:04:03,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:04:03,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:04:03,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:04:03,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:04:03,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:04:03,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:04:03,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:04:03,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:04:03,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:04:03,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:04:03,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:04:03,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:04:03,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:04:03,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:04:03,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:04:03,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:04:03,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:04:03,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:04:03,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:04:03,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:04:03,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:04:03,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:04:03,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:04:03,098 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:04:03,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:04:03,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:04:03,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:04:03,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:04:03,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:04:03,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:04:03,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:04:03,102 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:04:03,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:04:03,102 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:04:03,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:04:03,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:04:03,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:04:03,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:04:03,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:04:03,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:04:03,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:04:03,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:04:03,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:04:03,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:04:03,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:04:03,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:04:03,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:04:03,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:04:03,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:04:03,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:04:03,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:04:03,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:04:03,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:04:03,105 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:04:03,105 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:04:03,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:04:03,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32b030e5f1b46150870f8dd8e24821389f0ffe4175e43053767dc9109bffcf9b [2021-12-28 01:04:03,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:04:03,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:04:03,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:04:03,430 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:04:03,432 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:04:03,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.07.cil-2.c [2021-12-28 01:04:03,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afde3cc7f/81d8daacd4204d07a7de6930f2a6e859/FLAGa0397ead9 [2021-12-28 01:04:03,939 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:04:03,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.07.cil-2.c [2021-12-28 01:04:03,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afde3cc7f/81d8daacd4204d07a7de6930f2a6e859/FLAGa0397ead9 [2021-12-28 01:04:03,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afde3cc7f/81d8daacd4204d07a7de6930f2a6e859 [2021-12-28 01:04:03,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:04:03,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:04:03,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:04:03,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:04:03,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:04:03,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:04:03" (1/1) ... [2021-12-28 01:04:03,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c980ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:03, skipping insertion in model container [2021-12-28 01:04:03,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:04:03" (1/1) ... [2021-12-28 01:04:03,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:04:04,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:04:04,105 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/systemc/token_ring.07.cil-2.c[671,684] [2021-12-28 01:04:04,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:04:04,210 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:04:04,218 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/systemc/token_ring.07.cil-2.c[671,684] [2021-12-28 01:04:04,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:04:04,261 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:04:04,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04 WrapperNode [2021-12-28 01:04:04,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:04:04,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:04:04,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:04:04,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:04:04,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,302 INFO L137 Inliner]: procedures = 42, calls = 53, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 568 [2021-12-28 01:04:04,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:04:04,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:04:04,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:04:04,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:04:04,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:04:04,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:04:04,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:04:04,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:04:04,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (1/1) ... [2021-12-28 01:04:04,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:04:04,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:04:04,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:04:04,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:04:04,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:04:04,437 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-28 01:04:04,438 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-28 01:04:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-28 01:04:04,438 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-28 01:04:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-28 01:04:04,438 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-28 01:04:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 01:04:04,438 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 01:04:04,439 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-28 01:04:04,439 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-28 01:04:04,439 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-28 01:04:04,439 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-28 01:04:04,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:04:04,439 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-28 01:04:04,439 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-28 01:04:04,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:04:04,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:04:04,511 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:04:04,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:04:05,021 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:04:05,027 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:04:05,031 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-28 01:04:05,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:04:05 BoogieIcfgContainer [2021-12-28 01:04:05,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:04:05,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:04:05,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:04:05,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:04:05,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:04:03" (1/3) ... [2021-12-28 01:04:05,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd43e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:04:05, skipping insertion in model container [2021-12-28 01:04:05,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:04" (2/3) ... [2021-12-28 01:04:05,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd43e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:04:05, skipping insertion in model container [2021-12-28 01:04:05,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:04:05" (3/3) ... [2021-12-28 01:04:05,051 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.07.cil-2.c [2021-12-28 01:04:05,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:04:05,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:04:05,098 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:04:05,105 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:04:05,106 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:04:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 265 states, 233 states have (on average 1.648068669527897) internal successors, (384), 237 states have internal predecessors, (384), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-28 01:04:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:05,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:05,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:05,152 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1222528007, now seen corresponding path program 1 times [2021-12-28 01:04:05,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:05,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082053210] [2021-12-28 01:04:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:05,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:05,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:05,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082053210] [2021-12-28 01:04:05,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082053210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:05,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:05,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:04:05,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59902237] [2021-12-28 01:04:05,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:05,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:04:05,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:04:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:04:05,550 INFO L87 Difference]: Start difference. First operand has 265 states, 233 states have (on average 1.648068669527897) internal successors, (384), 237 states have internal predecessors, (384), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:06,400 INFO L93 Difference]: Finished difference Result 607 states and 997 transitions. [2021-12-28 01:04:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:04:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:06,426 INFO L225 Difference]: With dead ends: 607 [2021-12-28 01:04:06,427 INFO L226 Difference]: Without dead ends: 346 [2021-12-28 01:04:06,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:04:06,449 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 671 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:06,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 727 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 01:04:06,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-28 01:04:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 259. [2021-12-28 01:04:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 229 states have (on average 1.5589519650655022) internal successors, (357), 231 states have internal predecessors, (357), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-28 01:04:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 401 transitions. [2021-12-28 01:04:06,528 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 401 transitions. Word has length 123 [2021-12-28 01:04:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:06,528 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 401 transitions. [2021-12-28 01:04:06,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 401 transitions. [2021-12-28 01:04:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:06,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:06,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:06,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:04:06,532 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash -779358263, now seen corresponding path program 1 times [2021-12-28 01:04:06,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:06,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609797075] [2021-12-28 01:04:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:06,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:06,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:06,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:06,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:06,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:06,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:06,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:06,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609797075] [2021-12-28 01:04:06,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609797075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:06,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:06,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:04:06,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854916473] [2021-12-28 01:04:06,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:06,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:04:06,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:04:06,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:04:06,745 INFO L87 Difference]: Start difference. First operand 259 states and 401 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:08,153 INFO L93 Difference]: Finished difference Result 929 states and 1472 transitions. [2021-12-28 01:04:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:04:08,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:08,160 INFO L225 Difference]: With dead ends: 929 [2021-12-28 01:04:08,160 INFO L226 Difference]: Without dead ends: 685 [2021-12-28 01:04:08,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:04:08,163 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 997 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:08,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 1135 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 01:04:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-12-28 01:04:08,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 510. [2021-12-28 01:04:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 457 states have (on average 1.5711159737417943) internal successors, (718), 460 states have internal predecessors, (718), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2021-12-28 01:04:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 797 transitions. [2021-12-28 01:04:08,203 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 797 transitions. Word has length 123 [2021-12-28 01:04:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:08,204 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 797 transitions. [2021-12-28 01:04:08,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 797 transitions. [2021-12-28 01:04:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:08,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:08,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:08,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:04:08,206 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1797006651, now seen corresponding path program 1 times [2021-12-28 01:04:08,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:08,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898626738] [2021-12-28 01:04:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:08,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:08,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:08,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898626738] [2021-12-28 01:04:08,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898626738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:08,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:08,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:08,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931320466] [2021-12-28 01:04:08,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:08,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:08,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:08,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:08,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:08,322 INFO L87 Difference]: Start difference. First operand 510 states and 797 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:09,989 INFO L93 Difference]: Finished difference Result 1529 states and 2427 transitions. [2021-12-28 01:04:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:04:09,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:09,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:09,994 INFO L225 Difference]: With dead ends: 1529 [2021-12-28 01:04:09,994 INFO L226 Difference]: Without dead ends: 1034 [2021-12-28 01:04:09,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:04:09,997 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 1008 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:09,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1982 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 01:04:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-12-28 01:04:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 745. [2021-12-28 01:04:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 669 states have (on average 1.5650224215246638) internal successors, (1047), 673 states have internal predecessors, (1047), 55 states have call successors, (55), 19 states have call predecessors, (55), 20 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2021-12-28 01:04:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1160 transitions. [2021-12-28 01:04:10,062 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1160 transitions. Word has length 123 [2021-12-28 01:04:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1160 transitions. [2021-12-28 01:04:10,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1160 transitions. [2021-12-28 01:04:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:10,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:10,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:10,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:04:10,065 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:10,066 INFO L85 PathProgramCache]: Analyzing trace with hash -407712637, now seen corresponding path program 1 times [2021-12-28 01:04:10,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:10,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595449263] [2021-12-28 01:04:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:10,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:10,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:10,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:10,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:10,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:10,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:10,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595449263] [2021-12-28 01:04:10,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595449263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:10,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:10,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:10,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682183951] [2021-12-28 01:04:10,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:10,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:10,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:10,160 INFO L87 Difference]: Start difference. First operand 745 states and 1160 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:11,835 INFO L93 Difference]: Finished difference Result 2411 states and 3818 transitions. [2021-12-28 01:04:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:04:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:11,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:11,842 INFO L225 Difference]: With dead ends: 2411 [2021-12-28 01:04:11,843 INFO L226 Difference]: Without dead ends: 1681 [2021-12-28 01:04:11,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:04:11,846 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 1004 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:11,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 1975 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 01:04:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2021-12-28 01:04:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1218. [2021-12-28 01:04:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1096 states have (on average 1.5602189781021898) internal successors, (1710), 1102 states have internal predecessors, (1710), 87 states have call successors, (87), 31 states have call predecessors, (87), 34 states have return successors, (98), 88 states have call predecessors, (98), 85 states have call successors, (98) [2021-12-28 01:04:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1895 transitions. [2021-12-28 01:04:11,912 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1895 transitions. Word has length 123 [2021-12-28 01:04:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:11,913 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1895 transitions. [2021-12-28 01:04:11,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:11,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1895 transitions. [2021-12-28 01:04:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:11,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:11,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:11,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:04:11,915 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1853860613, now seen corresponding path program 1 times [2021-12-28 01:04:11,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:11,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44816522] [2021-12-28 01:04:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:11,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:12,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:12,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:12,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44816522] [2021-12-28 01:04:12,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44816522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:12,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:12,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:12,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573013820] [2021-12-28 01:04:12,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:12,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:12,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:12,015 INFO L87 Difference]: Start difference. First operand 1218 states and 1895 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:13,537 INFO L93 Difference]: Finished difference Result 4118 states and 6501 transitions. [2021-12-28 01:04:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:04:13,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:13,550 INFO L225 Difference]: With dead ends: 4118 [2021-12-28 01:04:13,551 INFO L226 Difference]: Without dead ends: 2915 [2021-12-28 01:04:13,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:04:13,558 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 1003 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:13,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 1970 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 01:04:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-12-28 01:04:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2167. [2021-12-28 01:04:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 1953 states have (on average 1.55657962109575) internal successors, (3040), 1963 states have internal predecessors, (3040), 151 states have call successors, (151), 55 states have call predecessors, (151), 62 states have return successors, (184), 156 states have call predecessors, (184), 149 states have call successors, (184) [2021-12-28 01:04:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 3375 transitions. [2021-12-28 01:04:13,665 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 3375 transitions. Word has length 123 [2021-12-28 01:04:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:13,665 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 3375 transitions. [2021-12-28 01:04:13,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 3375 transitions. [2021-12-28 01:04:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:13,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:13,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:13,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:04:13,668 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash -12848061, now seen corresponding path program 1 times [2021-12-28 01:04:13,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:13,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104742413] [2021-12-28 01:04:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:13,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:13,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:13,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:13,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:13,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:13,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:13,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104742413] [2021-12-28 01:04:13,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104742413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:13,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:13,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:13,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998582575] [2021-12-28 01:04:13,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:13,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:13,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:13,777 INFO L87 Difference]: Start difference. First operand 2167 states and 3375 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:15,413 INFO L93 Difference]: Finished difference Result 7533 states and 11887 transitions. [2021-12-28 01:04:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:04:15,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:15,436 INFO L225 Difference]: With dead ends: 7533 [2021-12-28 01:04:15,437 INFO L226 Difference]: Without dead ends: 5381 [2021-12-28 01:04:15,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:04:15,450 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 1002 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:15,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1965 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 01:04:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2021-12-28 01:04:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4072. [2021-12-28 01:04:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 3674 states have (on average 1.5541643984757758) internal successors, (5710), 3692 states have internal predecessors, (5710), 279 states have call successors, (279), 103 states have call predecessors, (279), 118 states have return successors, (374), 292 states have call predecessors, (374), 277 states have call successors, (374) [2021-12-28 01:04:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 6363 transitions. [2021-12-28 01:04:15,679 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 6363 transitions. Word has length 123 [2021-12-28 01:04:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:15,680 INFO L470 AbstractCegarLoop]: Abstraction has 4072 states and 6363 transitions. [2021-12-28 01:04:15,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 6363 transitions. [2021-12-28 01:04:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:15,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:15,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:15,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:04:15,684 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:15,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1319990459, now seen corresponding path program 1 times [2021-12-28 01:04:15,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:15,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7268688] [2021-12-28 01:04:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:15,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:15,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:15,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:15,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:15,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:15,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:15,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7268688] [2021-12-28 01:04:15,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7268688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:15,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:15,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:15,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171023088] [2021-12-28 01:04:15,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:15,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:15,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:15,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:15,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:15,806 INFO L87 Difference]: Start difference. First operand 4072 states and 6363 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:17,631 INFO L93 Difference]: Finished difference Result 14364 states and 22721 transitions. [2021-12-28 01:04:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:04:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:17,676 INFO L225 Difference]: With dead ends: 14364 [2021-12-28 01:04:17,676 INFO L226 Difference]: Without dead ends: 10307 [2021-12-28 01:04:17,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:04:17,693 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 1062 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:17,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 1330 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 01:04:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10307 states. [2021-12-28 01:04:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10307 to 7897. [2021-12-28 01:04:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7897 states, 7131 states have (on average 1.5526574113027627) internal successors, (11072), 7165 states have internal predecessors, (11072), 535 states have call successors, (535), 199 states have call predecessors, (535), 230 states have return successors, (808), 564 states have call predecessors, (808), 533 states have call successors, (808) [2021-12-28 01:04:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7897 states to 7897 states and 12415 transitions. [2021-12-28 01:04:18,114 INFO L78 Accepts]: Start accepts. Automaton has 7897 states and 12415 transitions. Word has length 123 [2021-12-28 01:04:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:18,114 INFO L470 AbstractCegarLoop]: Abstraction has 7897 states and 12415 transitions. [2021-12-28 01:04:18,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7897 states and 12415 transitions. [2021-12-28 01:04:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:18,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:18,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:18,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:04:18,121 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash 577506307, now seen corresponding path program 1 times [2021-12-28 01:04:18,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:18,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542791513] [2021-12-28 01:04:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:18,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:18,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:18,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:18,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:18,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:18,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:18,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:18,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542791513] [2021-12-28 01:04:18,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542791513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:18,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:18,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:18,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707424571] [2021-12-28 01:04:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:18,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:18,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:18,281 INFO L87 Difference]: Start difference. First operand 7897 states and 12415 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:20,535 INFO L93 Difference]: Finished difference Result 28027 states and 44583 transitions. [2021-12-28 01:04:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:04:20,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:20,608 INFO L225 Difference]: With dead ends: 28027 [2021-12-28 01:04:20,608 INFO L226 Difference]: Without dead ends: 20145 [2021-12-28 01:04:20,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:04:20,639 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 1000 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:20,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 1955 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 01:04:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20145 states. [2021-12-28 01:04:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20145 to 15578. [2021-12-28 01:04:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15578 states, 14076 states have (on average 1.5517192384200056) internal successors, (21842), 14142 states have internal predecessors, (21842), 1047 states have call successors, (1047), 391 states have call predecessors, (1047), 454 states have return successors, (1838), 1108 states have call predecessors, (1838), 1045 states have call successors, (1838) [2021-12-28 01:04:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15578 states to 15578 states and 24727 transitions. [2021-12-28 01:04:21,463 INFO L78 Accepts]: Start accepts. Automaton has 15578 states and 24727 transitions. Word has length 123 [2021-12-28 01:04:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:21,463 INFO L470 AbstractCegarLoop]: Abstraction has 15578 states and 24727 transitions. [2021-12-28 01:04:21,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 15578 states and 24727 transitions. [2021-12-28 01:04:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:21,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:21,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:21,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:04:21,484 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1608547205, now seen corresponding path program 1 times [2021-12-28 01:04:21,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:21,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034146666] [2021-12-28 01:04:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:21,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:21,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:21,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:21,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:21,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:21,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:21,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:21,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034146666] [2021-12-28 01:04:21,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034146666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:21,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:21,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:21,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79047929] [2021-12-28 01:04:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:21,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:21,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:21,574 INFO L87 Difference]: Start difference. First operand 15578 states and 24727 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:25,436 INFO L93 Difference]: Finished difference Result 62202 states and 99279 transitions. [2021-12-28 01:04:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:04:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:25,665 INFO L225 Difference]: With dead ends: 62202 [2021-12-28 01:04:25,666 INFO L226 Difference]: Without dead ends: 46639 [2021-12-28 01:04:25,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:04:25,722 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 1293 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:25,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 1938 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 01:04:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46639 states. [2021-12-28 01:04:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46639 to 30811. [2021-12-28 01:04:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30811 states, 27901 states have (on average 1.5536360703917422) internal successors, (43348), 28031 states have internal predecessors, (43348), 2007 states have call successors, (2007), 775 states have call predecessors, (2007), 902 states have return successors, (4320), 2132 states have call predecessors, (4320), 2005 states have call successors, (4320) [2021-12-28 01:04:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30811 states to 30811 states and 49675 transitions. [2021-12-28 01:04:27,503 INFO L78 Accepts]: Start accepts. Automaton has 30811 states and 49675 transitions. Word has length 123 [2021-12-28 01:04:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:27,503 INFO L470 AbstractCegarLoop]: Abstraction has 30811 states and 49675 transitions. [2021-12-28 01:04:27,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 30811 states and 49675 transitions. [2021-12-28 01:04:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:27,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:27,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:27,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:04:27,525 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash -297856061, now seen corresponding path program 1 times [2021-12-28 01:04:27,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:27,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913552266] [2021-12-28 01:04:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:27,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:27,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913552266] [2021-12-28 01:04:27,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913552266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:27,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:27,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:27,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516869465] [2021-12-28 01:04:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:27,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:27,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:27,634 INFO L87 Difference]: Start difference. First operand 30811 states and 49675 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:34,383 INFO L93 Difference]: Finished difference Result 119799 states and 194257 transitions. [2021-12-28 01:04:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:04:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:34,752 INFO L225 Difference]: With dead ends: 119799 [2021-12-28 01:04:34,752 INFO L226 Difference]: Without dead ends: 89003 [2021-12-28 01:04:34,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:04:34,888 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 1210 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:34,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 1929 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 01:04:34,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89003 states. [2021-12-28 01:04:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89003 to 61341. [2021-12-28 01:04:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61341 states, 55679 states have (on average 1.5567808329890982) internal successors, (86680), 55937 states have internal predecessors, (86680), 3863 states have call successors, (3863), 1543 states have call predecessors, (3863), 1798 states have return successors, (10678), 4116 states have call predecessors, (10678), 3861 states have call successors, (10678) [2021-12-28 01:04:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61341 states to 61341 states and 101221 transitions. [2021-12-28 01:04:38,944 INFO L78 Accepts]: Start accepts. Automaton has 61341 states and 101221 transitions. Word has length 123 [2021-12-28 01:04:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:38,944 INFO L470 AbstractCegarLoop]: Abstraction has 61341 states and 101221 transitions. [2021-12-28 01:04:38,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 61341 states and 101221 transitions. [2021-12-28 01:04:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:38,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:38,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:38,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:04:38,979 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:38,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:38,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1354587263, now seen corresponding path program 1 times [2021-12-28 01:04:38,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:38,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772465479] [2021-12-28 01:04:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:38,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:39,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:39,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:39,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:39,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:39,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:39,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:39,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772465479] [2021-12-28 01:04:39,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772465479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:39,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:39,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:39,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042185445] [2021-12-28 01:04:39,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:39,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:39,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:39,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:39,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:39,081 INFO L87 Difference]: Start difference. First operand 61341 states and 101221 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:44,614 INFO L93 Difference]: Finished difference Result 140060 states and 236570 transitions. [2021-12-28 01:04:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:04:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:04:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:44,951 INFO L225 Difference]: With dead ends: 140060 [2021-12-28 01:04:44,951 INFO L226 Difference]: Without dead ends: 78734 [2021-12-28 01:04:45,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:04:45,107 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 836 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:45,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 899 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 01:04:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78734 states. [2021-12-28 01:04:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78734 to 61341. [2021-12-28 01:04:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61341 states, 55679 states have (on average 1.5521650891718601) internal successors, (86423), 55937 states have internal predecessors, (86423), 3863 states have call successors, (3863), 1543 states have call predecessors, (3863), 1798 states have return successors, (10678), 4116 states have call predecessors, (10678), 3861 states have call successors, (10678) [2021-12-28 01:04:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61341 states to 61341 states and 100964 transitions. [2021-12-28 01:04:49,329 INFO L78 Accepts]: Start accepts. Automaton has 61341 states and 100964 transitions. Word has length 123 [2021-12-28 01:04:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:49,330 INFO L470 AbstractCegarLoop]: Abstraction has 61341 states and 100964 transitions. [2021-12-28 01:04:49,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:04:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 61341 states and 100964 transitions. [2021-12-28 01:04:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 01:04:49,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:49,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:49,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:04:49,388 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash -3202045, now seen corresponding path program 1 times [2021-12-28 01:04:49,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:49,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947838441] [2021-12-28 01:04:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:49,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:49,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:49,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 01:04:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:49,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:04:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:49,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:04:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:49,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 01:04:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:49,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:49,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947838441] [2021-12-28 01:04:49,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947838441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:49,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:49,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:49,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358923874] [2021-12-28 01:04:49,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:49,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:49,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:49,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:49,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:49,473 INFO L87 Difference]: Start difference. First operand 61341 states and 100964 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:05:02,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:05:02,237 INFO L93 Difference]: Finished difference Result 230453 states and 381921 transitions. [2021-12-28 01:05:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:05:02,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 01:05:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:05:03,150 INFO L225 Difference]: With dead ends: 230453 [2021-12-28 01:05:03,150 INFO L226 Difference]: Without dead ends: 169127 [2021-12-28 01:05:03,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:05:03,340 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 1022 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:05:03,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1978 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 01:05:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169127 states.