./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/combinations/pc_sfifo_3.cil+token_ring.15.cil.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 af1a65b4dba99a03062f9c0ef0e7df0ff9812521932f446bc475a13832d55c02 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:16:04,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:16:04,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:16:04,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:16:04,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:16:04,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:16:04,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:16:04,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:16:04,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:16:04,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:16:04,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:16:04,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:16:04,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:16:04,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:16:04,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:16:04,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:16:04,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:16:04,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:16:04,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:16:04,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:16:04,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:16:04,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:16:04,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:16:04,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:16:04,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:16:04,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:16:04,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:16:04,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:16:04,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:16:04,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:16:04,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:16:04,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:16:04,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:16:04,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:16:04,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:16:04,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:16:04,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:16:04,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:16:04,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:16:04,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:16:04,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:16:04,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:16:04,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:16:04,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:16:04,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:16:04,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:16:04,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:16:04,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:16:04,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:16:04,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:16:04,942 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:16:04,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:16:04,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:16:04,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:16:04,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:16:04,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:16:04,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:16:04,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:16:04,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:16:04,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:16:04,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:16:04,944 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:16:04,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:16:04,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:16:04,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:16:04,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:16:04,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:16:04,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:16:04,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:16:04,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:16:04,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:16:04,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:16:04,947 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:16:04,947 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:16:04,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:16:04,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:16:04,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af1a65b4dba99a03062f9c0ef0e7df0ff9812521932f446bc475a13832d55c02 [2021-12-22 13:16:05,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:16:05,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:16:05,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:16:05,173 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:16:05,174 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:16:05,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c [2021-12-22 13:16:05,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b81b0d211/76e2d678ca7a4a349342d27debd832e7/FLAG40dec592e [2021-12-22 13:16:05,643 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:16:05,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c [2021-12-22 13:16:05,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b81b0d211/76e2d678ca7a4a349342d27debd832e7/FLAG40dec592e [2021-12-22 13:16:06,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b81b0d211/76e2d678ca7a4a349342d27debd832e7 [2021-12-22 13:16:06,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:16:06,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:16:06,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:16:06,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:16:06,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:16:06,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14346b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06, skipping insertion in model container [2021-12-22 13:16:06,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:16:06,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:16:06,252 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/combinations/pc_sfifo_3.cil+token_ring.15.cil.c[911,924] [2021-12-22 13:16:06,293 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/combinations/pc_sfifo_3.cil+token_ring.15.cil.c[8416,8429] [2021-12-22 13:16:06,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:16:06,421 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:16:06,430 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/combinations/pc_sfifo_3.cil+token_ring.15.cil.c[911,924] [2021-12-22 13:16:06,459 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/combinations/pc_sfifo_3.cil+token_ring.15.cil.c[8416,8429] [2021-12-22 13:16:06,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:16:06,522 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:16:06,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06 WrapperNode [2021-12-22 13:16:06,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:16:06,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:16:06,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:16:06,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:16:06,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,588 INFO L137 Inliner]: procedures = 81, calls = 101, calls flagged for inlining = 49, calls inlined = 49, statements flattened = 1139 [2021-12-22 13:16:06,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:16:06,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:16:06,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:16:06,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:16:06,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:16:06,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:16:06,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:16:06,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:16:06,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (1/1) ... [2021-12-22 13:16:06,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:16:06,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:16:06,656 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) [2021-12-22 13:16:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:16:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:16:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:16:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-22 13:16:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-22 13:16:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:16:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:16:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:16:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:16:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-22 13:16:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-22 13:16:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:16:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:16:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:16:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:16:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-22 13:16:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-22 13:16:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-22 13:16:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-22 13:16:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-22 13:16:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-22 13:16:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:16:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:16:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:16:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:16:06,692 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:16:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-22 13:16:06,692 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-22 13:16:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:16:06,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:16:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:16:06,693 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:16:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:16:06,693 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:16:06,673 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 [2021-12-22 13:16:06,796 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:16:06,797 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:16:07,546 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-22 13:16:07,546 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-22 13:16:07,605 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:16:07,622 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:16:07,622 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-12-22 13:16:07,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:16:07 BoogieIcfgContainer [2021-12-22 13:16:07,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:16:07,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:16:07,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:16:07,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:16:07,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:16:06" (1/3) ... [2021-12-22 13:16:07,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b750ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:16:07, skipping insertion in model container [2021-12-22 13:16:07,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:06" (2/3) ... [2021-12-22 13:16:07,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b750ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:16:07, skipping insertion in model container [2021-12-22 13:16:07,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:16:07" (3/3) ... [2021-12-22 13:16:07,632 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.15.cil.c [2021-12-22 13:16:07,637 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:16:07,638 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:16:07,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:16:07,676 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 [2021-12-22 13:16:07,677 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:16:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 530 states, 467 states have (on average 1.6445396145610278) internal successors, (768), 475 states have internal predecessors, (768), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-12-22 13:16:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:16:07,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:07,705 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] [2021-12-22 13:16:07,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:07,709 INFO L85 PathProgramCache]: Analyzing trace with hash -103676450, now seen corresponding path program 1 times [2021-12-22 13:16:07,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:07,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490647302] [2021-12-22 13:16:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:07,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:07,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:07,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:08,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:08,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:16:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:08,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:16:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:08,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:16:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:08,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:08,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490647302] [2021-12-22 13:16:08,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490647302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:08,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:08,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:16:08,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117696524] [2021-12-22 13:16:08,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:08,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:16:08,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:16:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:16:08,115 INFO L87 Difference]: Start difference. First operand has 530 states, 467 states have (on average 1.6445396145610278) internal successors, (768), 475 states have internal predecessors, (768), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:16:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:09,091 INFO L93 Difference]: Finished difference Result 1181 states and 1901 transitions. [2021-12-22 13:16:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:16:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:16:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:09,110 INFO L225 Difference]: With dead ends: 1181 [2021-12-22 13:16:09,110 INFO L226 Difference]: Without dead ends: 670 [2021-12-22 13:16:09,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:16:09,122 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 1720 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1727 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:09,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1727 Valid, 2400 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:16:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-12-22 13:16:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 631. [2021-12-22 13:16:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 549 states have (on average 1.53551912568306) internal successors, (843), 556 states have internal predecessors, (843), 58 states have call successors, (58), 22 states have call predecessors, (58), 22 states have return successors, (59), 55 states have call predecessors, (59), 54 states have call successors, (59) [2021-12-22 13:16:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 960 transitions. [2021-12-22 13:16:09,198 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 960 transitions. Word has length 65 [2021-12-22 13:16:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:09,199 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 960 transitions. [2021-12-22 13:16:09,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:16:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 960 transitions. [2021-12-22 13:16:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:16:09,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:09,202 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] [2021-12-22 13:16:09,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:16:09,203 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1575212190, now seen corresponding path program 1 times [2021-12-22 13:16:09,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890120900] [2021-12-22 13:16:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:09,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:09,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:09,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:09,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:09,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:09,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:16:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:09,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:16:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:09,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:16:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:09,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:09,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890120900] [2021-12-22 13:16:09,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890120900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:09,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:09,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:16:09,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680945969] [2021-12-22 13:16:09,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:09,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:16:09,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:09,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:16:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:16:09,410 INFO L87 Difference]: Start difference. First operand 631 states and 960 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-22 13:16:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:11,042 INFO L93 Difference]: Finished difference Result 1664 states and 2420 transitions. [2021-12-22 13:16:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:16:11,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-22 13:16:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:11,048 INFO L225 Difference]: With dead ends: 1664 [2021-12-22 13:16:11,049 INFO L226 Difference]: Without dead ends: 1443 [2021-12-22 13:16:11,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:16:11,051 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 4057 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4077 SdHoareTripleChecker+Valid, 3465 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:11,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4077 Valid, 3465 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:16:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-12-22 13:16:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1304. [2021-12-22 13:16:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1092 states have (on average 1.4487179487179487) internal successors, (1582), 1107 states have internal predecessors, (1582), 129 states have call successors, (129), 75 states have call predecessors, (129), 81 states have return successors, (139), 123 states have call predecessors, (139), 125 states have call successors, (139) [2021-12-22 13:16:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1850 transitions. [2021-12-22 13:16:11,105 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1850 transitions. Word has length 65 [2021-12-22 13:16:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:11,106 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 1850 transitions. [2021-12-22 13:16:11,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-22 13:16:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1850 transitions. [2021-12-22 13:16:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:16:11,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:11,108 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] [2021-12-22 13:16:11,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:16:11,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:11,109 INFO L85 PathProgramCache]: Analyzing trace with hash -74351947, now seen corresponding path program 1 times [2021-12-22 13:16:11,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:11,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145906337] [2021-12-22 13:16:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:11,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:11,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:11,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:11,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:11,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:11,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:11,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:16:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:11,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:16:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:11,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:11,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145906337] [2021-12-22 13:16:11,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145906337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:11,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:11,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:16:11,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361108674] [2021-12-22 13:16:11,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:11,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:16:11,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:11,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:16:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:16:11,218 INFO L87 Difference]: Start difference. First operand 1304 states and 1850 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:16:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:12,207 INFO L93 Difference]: Finished difference Result 2330 states and 3244 transitions. [2021-12-22 13:16:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:16:12,208 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-22 13:16:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:12,213 INFO L225 Difference]: With dead ends: 2330 [2021-12-22 13:16:12,213 INFO L226 Difference]: Without dead ends: 1442 [2021-12-22 13:16:12,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:16:12,215 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 708 mSDsluCounter, 2925 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 3716 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:12,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 3716 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:16:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-12-22 13:16:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1334. [2021-12-22 13:16:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1116 states have (on average 1.4363799283154122) internal successors, (1603), 1131 states have internal predecessors, (1603), 129 states have call successors, (129), 75 states have call predecessors, (129), 87 states have return successors, (145), 129 states have call predecessors, (145), 125 states have call successors, (145) [2021-12-22 13:16:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1877 transitions. [2021-12-22 13:16:12,252 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1877 transitions. Word has length 66 [2021-12-22 13:16:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:12,252 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 1877 transitions. [2021-12-22 13:16:12,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:16:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1877 transitions. [2021-12-22 13:16:12,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:16:12,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:12,254 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] [2021-12-22 13:16:12,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:16:12,254 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:12,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1103711245, now seen corresponding path program 1 times [2021-12-22 13:16:12,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:12,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278980876] [2021-12-22 13:16:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:12,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:12,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:12,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:12,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:12,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:12,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:16:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:12,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:16:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:12,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:12,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278980876] [2021-12-22 13:16:12,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278980876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:12,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:12,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:16:12,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854115939] [2021-12-22 13:16:12,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:12,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:16:12,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:12,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:16:12,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:16:12,385 INFO L87 Difference]: Start difference. First operand 1334 states and 1877 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:16:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:13,797 INFO L93 Difference]: Finished difference Result 3672 states and 5064 transitions. [2021-12-22 13:16:13,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:16:13,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-22 13:16:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:13,803 INFO L225 Difference]: With dead ends: 3672 [2021-12-22 13:16:13,803 INFO L226 Difference]: Without dead ends: 1577 [2021-12-22 13:16:13,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:16:13,807 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 4112 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4132 SdHoareTripleChecker+Valid, 3488 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:13,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4132 Valid, 3488 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:16:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-12-22 13:16:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1422. [2021-12-22 13:16:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1169 states have (on average 1.4029084687767321) internal successors, (1640), 1184 states have internal predecessors, (1640), 149 states have call successors, (149), 89 states have call predecessors, (149), 102 states have return successors, (166), 150 states have call predecessors, (166), 145 states have call successors, (166) [2021-12-22 13:16:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1955 transitions. [2021-12-22 13:16:13,846 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1955 transitions. Word has length 66 [2021-12-22 13:16:13,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:13,847 INFO L470 AbstractCegarLoop]: Abstraction has 1422 states and 1955 transitions. [2021-12-22 13:16:13,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:16:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1955 transitions. [2021-12-22 13:16:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:16:13,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:13,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:13,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:16:13,849 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:13,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1875323271, now seen corresponding path program 1 times [2021-12-22 13:16:13,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:13,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919346940] [2021-12-22 13:16:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:13,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:13,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:13,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:13,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:13,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:13,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:13,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:16:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:16:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:13,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:16:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:16:13,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:13,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919346940] [2021-12-22 13:16:13,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919346940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:13,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:13,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:16:13,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644001752] [2021-12-22 13:16:13,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:13,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:16:13,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:16:13,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:16:13,939 INFO L87 Difference]: Start difference. First operand 1422 states and 1955 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:16:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:14,875 INFO L93 Difference]: Finished difference Result 2599 states and 3506 transitions. [2021-12-22 13:16:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:16:14,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-22 13:16:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:14,881 INFO L225 Difference]: With dead ends: 2599 [2021-12-22 13:16:14,881 INFO L226 Difference]: Without dead ends: 1593 [2021-12-22 13:16:14,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:16:14,887 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 700 mSDsluCounter, 2864 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 3642 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:14,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 3642 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:16:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-12-22 13:16:14,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1462. [2021-12-22 13:16:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1201 states have (on average 1.3896752706078268) internal successors, (1669), 1216 states have internal predecessors, (1669), 149 states have call successors, (149), 89 states have call predecessors, (149), 110 states have return successors, (174), 158 states have call predecessors, (174), 145 states have call successors, (174) [2021-12-22 13:16:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1992 transitions. [2021-12-22 13:16:14,930 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1992 transitions. Word has length 91 [2021-12-22 13:16:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:14,931 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 1992 transitions. [2021-12-22 13:16:14,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:16:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1992 transitions. [2021-12-22 13:16:14,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:16:14,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:14,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:14,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:16:14,937 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1975743351, now seen corresponding path program 1 times [2021-12-22 13:16:14,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:14,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442963255] [2021-12-22 13:16:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:14,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:14,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:14,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:14,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:14,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:15,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:15,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:16:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:15,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:16:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:15,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:16:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:16:15,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:15,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442963255] [2021-12-22 13:16:15,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442963255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:15,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:15,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:16:15,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091633043] [2021-12-22 13:16:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:15,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:16:15,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:16:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:16:15,023 INFO L87 Difference]: Start difference. First operand 1462 states and 1992 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:16:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:15,981 INFO L93 Difference]: Finished difference Result 3500 states and 4597 transitions. [2021-12-22 13:16:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:16:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-22 13:16:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:15,990 INFO L225 Difference]: With dead ends: 3500 [2021-12-22 13:16:16,003 INFO L226 Difference]: Without dead ends: 2455 [2021-12-22 13:16:16,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:16:16,007 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 1941 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 2421 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:16,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1975 Valid, 2421 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:16:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-12-22 13:16:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2139. [2021-12-22 13:16:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 1730 states have (on average 1.3485549132947976) internal successors, (2333), 1758 states have internal predecessors, (2333), 225 states have call successors, (225), 142 states have call predecessors, (225), 182 states have return successors, (287), 241 states have call predecessors, (287), 221 states have call successors, (287) [2021-12-22 13:16:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 2845 transitions. [2021-12-22 13:16:16,104 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 2845 transitions. Word has length 91 [2021-12-22 13:16:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:16,104 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 2845 transitions. [2021-12-22 13:16:16,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:16:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 2845 transitions. [2021-12-22 13:16:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:16:16,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:16,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:16,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:16:16,106 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash -36581305, now seen corresponding path program 1 times [2021-12-22 13:16:16,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:16,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085248679] [2021-12-22 13:16:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:16,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:16:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:16:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:16:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:16:16,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:16,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085248679] [2021-12-22 13:16:16,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085248679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:16,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:16,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:16,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97053501] [2021-12-22 13:16:16,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:16,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:16,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:16,188 INFO L87 Difference]: Start difference. First operand 2139 states and 2845 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-22 13:16:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:16,721 INFO L93 Difference]: Finished difference Result 5798 states and 7627 transitions. [2021-12-22 13:16:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:16:16,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-22 13:16:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:16,737 INFO L225 Difference]: With dead ends: 5798 [2021-12-22 13:16:16,751 INFO L226 Difference]: Without dead ends: 4078 [2021-12-22 13:16:16,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:16:16,757 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 1486 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:16,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 2299 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:16:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-12-22 13:16:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3858. [2021-12-22 13:16:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 3068 states have (on average 1.302477183833116) internal successors, (3996), 3132 states have internal predecessors, (3996), 418 states have call successors, (418), 276 states have call predecessors, (418), 370 states have return successors, (627), 454 states have call predecessors, (627), 414 states have call successors, (627) [2021-12-22 13:16:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 5041 transitions. [2021-12-22 13:16:16,877 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 5041 transitions. Word has length 91 [2021-12-22 13:16:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:16,878 INFO L470 AbstractCegarLoop]: Abstraction has 3858 states and 5041 transitions. [2021-12-22 13:16:16,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-22 13:16:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 5041 transitions. [2021-12-22 13:16:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:16:16,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:16,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:16,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:16:16,880 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1094419383, now seen corresponding path program 1 times [2021-12-22 13:16:16,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:16,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281775382] [2021-12-22 13:16:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:16,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:16:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:16:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:16:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:16:16,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:16,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281775382] [2021-12-22 13:16:16,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281775382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:16,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:16,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:16:16,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830390115] [2021-12-22 13:16:16,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:16,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:16:16,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:16,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:16:16,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:16:16,943 INFO L87 Difference]: Start difference. First operand 3858 states and 5041 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:16:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:17,524 INFO L93 Difference]: Finished difference Result 5696 states and 7344 transitions. [2021-12-22 13:16:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:16:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-22 13:16:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:17,532 INFO L225 Difference]: With dead ends: 5696 [2021-12-22 13:16:17,533 INFO L226 Difference]: Without dead ends: 2257 [2021-12-22 13:16:17,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:17,539 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 1160 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:17,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 1835 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:16:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-22 13:16:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2139. [2021-12-22 13:16:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 1730 states have (on average 1.323699421965318) internal successors, (2290), 1758 states have internal predecessors, (2290), 225 states have call successors, (225), 142 states have call predecessors, (225), 182 states have return successors, (287), 241 states have call predecessors, (287), 221 states have call successors, (287) [2021-12-22 13:16:17,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 2802 transitions. [2021-12-22 13:16:17,599 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 2802 transitions. Word has length 91 [2021-12-22 13:16:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:17,600 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 2802 transitions. [2021-12-22 13:16:17,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:16:17,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 2802 transitions. [2021-12-22 13:16:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 13:16:17,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:17,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:17,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:16:17,602 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:17,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1268013203, now seen corresponding path program 1 times [2021-12-22 13:16:17,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:17,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941100550] [2021-12-22 13:16:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:17,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:17,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:17,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:17,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:17,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:17,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:17,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:16:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:17,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:16:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:17,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:16:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:16:17,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:17,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941100550] [2021-12-22 13:16:17,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941100550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:17,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:17,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:16:17,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182520959] [2021-12-22 13:16:17,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:17,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:16:17,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:17,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:16:17,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:16:17,683 INFO L87 Difference]: Start difference. First operand 2139 states and 2802 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:16:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:18,866 INFO L93 Difference]: Finished difference Result 4965 states and 6404 transitions. [2021-12-22 13:16:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 13:16:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-22 13:16:18,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:18,877 INFO L225 Difference]: With dead ends: 4965 [2021-12-22 13:16:18,877 INFO L226 Difference]: Without dead ends: 2938 [2021-12-22 13:16:18,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-22 13:16:18,884 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 2631 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2675 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:18,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2675 Valid, 2450 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:16:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-12-22 13:16:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2761. [2021-12-22 13:16:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2196 states have (on average 1.284608378870674) internal successors, (2821), 2232 states have internal predecessors, (2821), 303 states have call successors, (303), 190 states have call predecessors, (303), 260 states have return successors, (420), 341 states have call predecessors, (420), 299 states have call successors, (420) [2021-12-22 13:16:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3544 transitions. [2021-12-22 13:16:19,012 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3544 transitions. Word has length 92 [2021-12-22 13:16:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:19,012 INFO L470 AbstractCegarLoop]: Abstraction has 2761 states and 3544 transitions. [2021-12-22 13:16:19,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:16:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3544 transitions. [2021-12-22 13:16:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 13:16:19,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:19,016 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:19,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:16:19,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1207382224, now seen corresponding path program 1 times [2021-12-22 13:16:19,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:19,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588896662] [2021-12-22 13:16:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:19,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:16:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:16:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:16:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:16:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:16:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:16:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:16:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 13:16:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:16:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:16:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-22 13:16:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 13:16:19,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:19,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588896662] [2021-12-22 13:16:19,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588896662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:16:19,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72826727] [2021-12-22 13:16:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:19,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:16:19,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:16:19,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:16:19,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:16:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:19,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:16:19,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:16:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 13:16:19,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:16:19,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72826727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:19,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:16:19,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-22 13:16:19,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893950535] [2021-12-22 13:16:19,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:19,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:16:19,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:19,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:16:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:19,519 INFO L87 Difference]: Start difference. First operand 2761 states and 3544 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:16:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:19,661 INFO L93 Difference]: Finished difference Result 7086 states and 8859 transitions. [2021-12-22 13:16:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:16:19,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2021-12-22 13:16:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:19,674 INFO L225 Difference]: With dead ends: 7086 [2021-12-22 13:16:19,674 INFO L226 Difference]: Without dead ends: 4898 [2021-12-22 13:16:19,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:19,677 INFO L933 BasicCegarLoop]: 801 mSDtfsCounter, 61 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:19,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1569 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:16:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-12-22 13:16:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 4853. [2021-12-22 13:16:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4853 states, 3821 states have (on average 1.248102590944779) internal successors, (4769), 3886 states have internal predecessors, (4769), 537 states have call successors, (537), 372 states have call predecessors, (537), 493 states have return successors, (727), 597 states have call predecessors, (727), 533 states have call successors, (727) [2021-12-22 13:16:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4853 states to 4853 states and 6033 transitions. [2021-12-22 13:16:19,807 INFO L78 Accepts]: Start accepts. Automaton has 4853 states and 6033 transitions. Word has length 163 [2021-12-22 13:16:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:19,807 INFO L470 AbstractCegarLoop]: Abstraction has 4853 states and 6033 transitions. [2021-12-22 13:16:19,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:16:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4853 states and 6033 transitions. [2021-12-22 13:16:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-22 13:16:19,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:19,811 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:19,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:16:20,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 13:16:20,024 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:20,024 INFO L85 PathProgramCache]: Analyzing trace with hash -207723447, now seen corresponding path program 1 times [2021-12-22 13:16:20,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:20,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223799585] [2021-12-22 13:16:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:20,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:16:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:16:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:16:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:16:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:16:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:16:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:16:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:16:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:16:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:16:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-22 13:16:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-22 13:16:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-22 13:16:20,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223799585] [2021-12-22 13:16:20,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223799585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:16:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152924787] [2021-12-22 13:16:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:20,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:16:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:16:20,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:16:20,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:16:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:20,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:16:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:16:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 13:16:20,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:16:20,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152924787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:20,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:16:20,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-22 13:16:20,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606006722] [2021-12-22 13:16:20,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:20,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:16:20,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:20,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:16:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:20,633 INFO L87 Difference]: Start difference. First operand 4853 states and 6033 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 13:16:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:20,869 INFO L93 Difference]: Finished difference Result 13721 states and 16771 transitions. [2021-12-22 13:16:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:16:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 195 [2021-12-22 13:16:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:20,923 INFO L225 Difference]: With dead ends: 13721 [2021-12-22 13:16:20,924 INFO L226 Difference]: Without dead ends: 9287 [2021-12-22 13:16:20,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:20,937 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 52 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:20,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1569 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:16:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9287 states. [2021-12-22 13:16:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9287 to 9277. [2021-12-22 13:16:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9277 states, 7258 states have (on average 1.2241664370349958) internal successors, (8885), 7383 states have internal predecessors, (8885), 1037 states have call successors, (1037), 736 states have call predecessors, (1037), 980 states have return successors, (1420), 1160 states have call predecessors, (1420), 1033 states have call successors, (1420) [2021-12-22 13:16:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9277 states to 9277 states and 11342 transitions. [2021-12-22 13:16:21,251 INFO L78 Accepts]: Start accepts. Automaton has 9277 states and 11342 transitions. Word has length 195 [2021-12-22 13:16:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:21,251 INFO L470 AbstractCegarLoop]: Abstraction has 9277 states and 11342 transitions. [2021-12-22 13:16:21,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 13:16:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9277 states and 11342 transitions. [2021-12-22 13:16:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-22 13:16:21,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:21,257 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:21,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:16:21,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 13:16:21,486 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1105116725, now seen corresponding path program 1 times [2021-12-22 13:16:21,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:21,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22240956] [2021-12-22 13:16:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:21,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:16:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:16:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:16:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:16:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:16:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:16:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:16:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:16:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:16:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:16:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:16:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:16:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:16:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:16:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-22 13:16:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-22 13:16:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-22 13:16:21,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22240956] [2021-12-22 13:16:21,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22240956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:16:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044258059] [2021-12-22 13:16:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:21,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:16:21,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:16:21,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:16:21,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:16:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:21,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:16:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:16:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-22 13:16:22,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:16:22,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044258059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:22,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:16:22,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-22 13:16:22,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041438043] [2021-12-22 13:16:22,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:22,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:16:22,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:22,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:16:22,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:22,002 INFO L87 Difference]: Start difference. First operand 9277 states and 11342 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-22 13:16:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:22,224 INFO L93 Difference]: Finished difference Result 15807 states and 19582 transitions. [2021-12-22 13:16:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:16:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 195 [2021-12-22 13:16:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:22,229 INFO L225 Difference]: With dead ends: 15807 [2021-12-22 13:16:22,229 INFO L226 Difference]: Without dead ends: 408 [2021-12-22 13:16:22,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:22,250 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 669 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:22,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 773 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:16:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-22 13:16:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2021-12-22 13:16:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.5833333333333333) internal successors, (589), 374 states have internal predecessors, (589), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-22 13:16:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 645 transitions. [2021-12-22 13:16:22,260 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 645 transitions. Word has length 195 [2021-12-22 13:16:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:22,260 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 645 transitions. [2021-12-22 13:16:22,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-22 13:16:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 645 transitions. [2021-12-22 13:16:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:22,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:22,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:22,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:16:22,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:16:22,479 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash -397337084, now seen corresponding path program 1 times [2021-12-22 13:16:22,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:22,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348843037] [2021-12-22 13:16:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:22,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:22,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:22,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:22,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:22,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:22,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:22,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:22,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348843037] [2021-12-22 13:16:22,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348843037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:22,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:22,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:16:22,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154941258] [2021-12-22 13:16:22,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:22,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:16:22,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:22,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:16:22,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:16:22,607 INFO L87 Difference]: Start difference. First operand 408 states and 645 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-22 13:16:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:23,764 INFO L93 Difference]: Finished difference Result 957 states and 1535 transitions. [2021-12-22 13:16:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:16:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:23,766 INFO L225 Difference]: With dead ends: 957 [2021-12-22 13:16:23,766 INFO L226 Difference]: Without dead ends: 561 [2021-12-22 13:16:23,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:16:23,768 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1110 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:23,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 1160 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:16:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-12-22 13:16:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 408. [2021-12-22 13:16:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.5806451612903225) internal successors, (588), 374 states have internal predecessors, (588), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-22 13:16:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 644 transitions. [2021-12-22 13:16:23,784 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 644 transitions. Word has length 190 [2021-12-22 13:16:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:23,784 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 644 transitions. [2021-12-22 13:16:23,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-22 13:16:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 644 transitions. [2021-12-22 13:16:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:23,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:23,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:23,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:16:23,786 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:23,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:23,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1996486142, now seen corresponding path program 1 times [2021-12-22 13:16:23,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:23,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340817760] [2021-12-22 13:16:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:23,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:23,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:23,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:23,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:23,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:23,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:23,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:23,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340817760] [2021-12-22 13:16:23,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340817760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:23,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:23,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:16:23,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291201511] [2021-12-22 13:16:23,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:23,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:16:23,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:23,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:16:23,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:16:23,937 INFO L87 Difference]: Start difference. First operand 408 states and 644 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-22 13:16:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:25,050 INFO L93 Difference]: Finished difference Result 949 states and 1518 transitions. [2021-12-22 13:16:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:16:25,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:25,053 INFO L225 Difference]: With dead ends: 949 [2021-12-22 13:16:25,053 INFO L226 Difference]: Without dead ends: 561 [2021-12-22 13:16:25,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:16:25,055 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 1101 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:25,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 1158 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:16:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-12-22 13:16:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 408. [2021-12-22 13:16:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.5779569892473118) internal successors, (587), 374 states have internal predecessors, (587), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-22 13:16:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 643 transitions. [2021-12-22 13:16:25,072 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 643 transitions. Word has length 190 [2021-12-22 13:16:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:25,072 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 643 transitions. [2021-12-22 13:16:25,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-22 13:16:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 643 transitions. [2021-12-22 13:16:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:25,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:25,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:25,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:16:25,074 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2086546432, now seen corresponding path program 1 times [2021-12-22 13:16:25,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:25,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185613842] [2021-12-22 13:16:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:25,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:25,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:25,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:25,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:25,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:25,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:25,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185613842] [2021-12-22 13:16:25,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185613842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:25,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:25,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:16:25,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146339946] [2021-12-22 13:16:25,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:25,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:16:25,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:25,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:16:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:16:25,190 INFO L87 Difference]: Start difference. First operand 408 states and 643 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-22 13:16:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:27,663 INFO L93 Difference]: Finished difference Result 1506 states and 2426 transitions. [2021-12-22 13:16:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:16:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:27,666 INFO L225 Difference]: With dead ends: 1506 [2021-12-22 13:16:27,666 INFO L226 Difference]: Without dead ends: 1120 [2021-12-22 13:16:27,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:27,672 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 1682 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:27,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 2025 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2148 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 13:16:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-12-22 13:16:27,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 813. [2021-12-22 13:16:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 748 states have (on average 1.5909090909090908) internal successors, (1190), 751 states have internal predecessors, (1190), 51 states have call successors, (51), 13 states have call predecessors, (51), 13 states have return successors, (52), 49 states have call predecessors, (52), 49 states have call successors, (52) [2021-12-22 13:16:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1293 transitions. [2021-12-22 13:16:27,721 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1293 transitions. Word has length 190 [2021-12-22 13:16:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:27,721 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1293 transitions. [2021-12-22 13:16:27,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-22 13:16:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1293 transitions. [2021-12-22 13:16:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:27,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:27,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:27,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:16:27,723 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:27,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:27,724 INFO L85 PathProgramCache]: Analyzing trace with hash 361394428, now seen corresponding path program 1 times [2021-12-22 13:16:27,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:27,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686274045] [2021-12-22 13:16:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:27,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:27,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:27,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:27,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:27,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:27,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:27,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686274045] [2021-12-22 13:16:27,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686274045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:27,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:27,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:27,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004040969] [2021-12-22 13:16:27,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:27,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:27,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:27,850 INFO L87 Difference]: Start difference. First operand 813 states and 1293 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:30,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:30,860 INFO L93 Difference]: Finished difference Result 2490 states and 4021 transitions. [2021-12-22 13:16:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:16:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:30,873 INFO L225 Difference]: With dead ends: 2490 [2021-12-22 13:16:30,874 INFO L226 Difference]: Without dead ends: 1699 [2021-12-22 13:16:30,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:16:30,875 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 1826 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 2942 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:30,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1846 Valid, 2295 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2942 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 13:16:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-12-22 13:16:30,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1189. [2021-12-22 13:16:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1095 states have (on average 1.5844748858447488) internal successors, (1735), 1099 states have internal predecessors, (1735), 73 states have call successors, (73), 19 states have call predecessors, (73), 20 states have return successors, (76), 72 states have call predecessors, (76), 71 states have call successors, (76) [2021-12-22 13:16:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1884 transitions. [2021-12-22 13:16:30,956 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1884 transitions. Word has length 190 [2021-12-22 13:16:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:30,957 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1884 transitions. [2021-12-22 13:16:30,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1884 transitions. [2021-12-22 13:16:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:30,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:30,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:30,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:16:30,959 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1561856002, now seen corresponding path program 1 times [2021-12-22 13:16:30,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:30,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248974797] [2021-12-22 13:16:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:30,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:30,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:31,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:31,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:31,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:31,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248974797] [2021-12-22 13:16:31,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248974797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:31,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:31,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:31,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573979458] [2021-12-22 13:16:31,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:31,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:31,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:31,114 INFO L87 Difference]: Start difference. First operand 1189 states and 1884 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:34,090 INFO L93 Difference]: Finished difference Result 3941 states and 6352 transitions. [2021-12-22 13:16:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:16:34,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:34,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:34,098 INFO L225 Difference]: With dead ends: 3941 [2021-12-22 13:16:34,098 INFO L226 Difference]: Without dead ends: 2774 [2021-12-22 13:16:34,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:16:34,101 INFO L933 BasicCegarLoop]: 1087 mSDtfsCounter, 1715 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 3286 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 3201 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:34,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 3201 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3286 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 13:16:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2021-12-22 13:16:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 1942. [2021-12-22 13:16:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1790 states have (on average 1.5787709497206703) internal successors, (2826), 1796 states have internal predecessors, (2826), 117 states have call successors, (117), 31 states have call predecessors, (117), 34 states have return successors, (128), 118 states have call predecessors, (128), 115 states have call successors, (128) [2021-12-22 13:16:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3071 transitions. [2021-12-22 13:16:34,238 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3071 transitions. Word has length 190 [2021-12-22 13:16:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:34,238 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 3071 transitions. [2021-12-22 13:16:34,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3071 transitions. [2021-12-22 13:16:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:34,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:34,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:34,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:16:34,240 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:34,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:34,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1008502972, now seen corresponding path program 1 times [2021-12-22 13:16:34,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:34,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356277317] [2021-12-22 13:16:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:34,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:34,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:34,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:34,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:34,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:34,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:34,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:34,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356277317] [2021-12-22 13:16:34,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356277317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:34,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:34,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:34,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308544751] [2021-12-22 13:16:34,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:34,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:34,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:34,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:34,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:34,354 INFO L87 Difference]: Start difference. First operand 1942 states and 3071 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:35,747 INFO L93 Difference]: Finished difference Result 4682 states and 7530 transitions. [2021-12-22 13:16:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:16:35,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:35,774 INFO L225 Difference]: With dead ends: 4682 [2021-12-22 13:16:35,774 INFO L226 Difference]: Without dead ends: 2762 [2021-12-22 13:16:35,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:35,779 INFO L933 BasicCegarLoop]: 698 mSDtfsCounter, 1392 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:35,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1413 Valid, 1503 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:16:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-12-22 13:16:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1942. [2021-12-22 13:16:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1790 states have (on average 1.5759776536312848) internal successors, (2821), 1796 states have internal predecessors, (2821), 117 states have call successors, (117), 31 states have call predecessors, (117), 34 states have return successors, (128), 118 states have call predecessors, (128), 115 states have call successors, (128) [2021-12-22 13:16:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3066 transitions. [2021-12-22 13:16:35,895 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3066 transitions. Word has length 190 [2021-12-22 13:16:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:35,895 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 3066 transitions. [2021-12-22 13:16:35,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3066 transitions. [2021-12-22 13:16:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:35,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:35,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:35,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:16:35,897 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:35,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:35,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1507059774, now seen corresponding path program 1 times [2021-12-22 13:16:35,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:35,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071097146] [2021-12-22 13:16:35,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:35,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:35,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:35,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:36,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:36,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:36,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:36,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071097146] [2021-12-22 13:16:36,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071097146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:36,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:36,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:36,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613503994] [2021-12-22 13:16:36,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:36,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:36,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:36,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:36,024 INFO L87 Difference]: Start difference. First operand 1942 states and 3066 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:37,267 INFO L93 Difference]: Finished difference Result 4676 states and 7504 transitions. [2021-12-22 13:16:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:16:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:37,274 INFO L225 Difference]: With dead ends: 4676 [2021-12-22 13:16:37,274 INFO L226 Difference]: Without dead ends: 2756 [2021-12-22 13:16:37,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:37,280 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 1393 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:37,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 1497 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:16:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-12-22 13:16:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 1942. [2021-12-22 13:16:37,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1790 states have (on average 1.5731843575418993) internal successors, (2816), 1796 states have internal predecessors, (2816), 117 states have call successors, (117), 31 states have call predecessors, (117), 34 states have return successors, (128), 118 states have call predecessors, (128), 115 states have call successors, (128) [2021-12-22 13:16:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3061 transitions. [2021-12-22 13:16:37,401 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3061 transitions. Word has length 190 [2021-12-22 13:16:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:37,402 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 3061 transitions. [2021-12-22 13:16:37,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3061 transitions. [2021-12-22 13:16:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:37,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:37,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:37,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:16:37,405 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:37,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2077331580, now seen corresponding path program 1 times [2021-12-22 13:16:37,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:37,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882670448] [2021-12-22 13:16:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:37,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:37,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:37,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:37,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:37,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:37,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:37,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:37,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882670448] [2021-12-22 13:16:37,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882670448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:37,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:37,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:37,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324159501] [2021-12-22 13:16:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:37,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:37,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:37,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:37,515 INFO L87 Difference]: Start difference. First operand 1942 states and 3061 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:40,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:40,172 INFO L93 Difference]: Finished difference Result 6711 states and 10723 transitions. [2021-12-22 13:16:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:16:40,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:40,186 INFO L225 Difference]: With dead ends: 6711 [2021-12-22 13:16:40,187 INFO L226 Difference]: Without dead ends: 4791 [2021-12-22 13:16:40,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:16:40,191 INFO L933 BasicCegarLoop]: 1063 mSDtfsCounter, 1693 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 3235 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 3329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:40,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 3177 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3235 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 13:16:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-12-22 13:16:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 3462. [2021-12-22 13:16:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3194 states have (on average 1.5685660613650594) internal successors, (5010), 3204 states have internal predecessors, (5010), 205 states have call successors, (205), 55 states have call predecessors, (205), 62 states have return successors, (238), 210 states have call predecessors, (238), 203 states have call successors, (238) [2021-12-22 13:16:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 5453 transitions. [2021-12-22 13:16:40,429 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 5453 transitions. Word has length 190 [2021-12-22 13:16:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:40,429 INFO L470 AbstractCegarLoop]: Abstraction has 3462 states and 5453 transitions. [2021-12-22 13:16:40,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 5453 transitions. [2021-12-22 13:16:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:40,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:40,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:40,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:16:40,431 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1291333690, now seen corresponding path program 1 times [2021-12-22 13:16:40,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:40,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727185256] [2021-12-22 13:16:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:40,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:40,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:40,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:40,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:40,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:40,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:40,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727185256] [2021-12-22 13:16:40,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727185256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:40,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:40,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:40,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727416082] [2021-12-22 13:16:40,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:40,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:40,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:40,547 INFO L87 Difference]: Start difference. First operand 3462 states and 5453 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:44,123 INFO L93 Difference]: Finished difference Result 12289 states and 19601 transitions. [2021-12-22 13:16:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:16:44,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:44,143 INFO L225 Difference]: With dead ends: 12289 [2021-12-22 13:16:44,143 INFO L226 Difference]: Without dead ends: 8849 [2021-12-22 13:16:44,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:16:44,149 INFO L933 BasicCegarLoop]: 1058 mSDtfsCounter, 1692 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 3227 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:44,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 3172 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3227 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 13:16:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8849 states. [2021-12-22 13:16:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8849 to 6503. [2021-12-22 13:16:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6503 states, 6003 states have (on average 1.565217391304348) internal successors, (9396), 6021 states have internal predecessors, (9396), 381 states have call successors, (381), 103 states have call predecessors, (381), 118 states have return successors, (476), 394 states have call predecessors, (476), 379 states have call successors, (476) [2021-12-22 13:16:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6503 states to 6503 states and 10253 transitions. [2021-12-22 13:16:44,645 INFO L78 Accepts]: Start accepts. Automaton has 6503 states and 10253 transitions. Word has length 190 [2021-12-22 13:16:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:44,645 INFO L470 AbstractCegarLoop]: Abstraction has 6503 states and 10253 transitions. [2021-12-22 13:16:44,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6503 states and 10253 transitions. [2021-12-22 13:16:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:44,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:44,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:44,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:16:44,649 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1958715580, now seen corresponding path program 1 times [2021-12-22 13:16:44,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:44,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753931490] [2021-12-22 13:16:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:44,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:44,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:44,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:44,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:44,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:44,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:44,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:44,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753931490] [2021-12-22 13:16:44,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753931490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:44,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:44,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:44,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32956272] [2021-12-22 13:16:44,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:44,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:44,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:44,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:44,763 INFO L87 Difference]: Start difference. First operand 6503 states and 10253 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:48,959 INFO L93 Difference]: Finished difference Result 23440 states and 37407 transitions. [2021-12-22 13:16:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:16:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:49,006 INFO L225 Difference]: With dead ends: 23440 [2021-12-22 13:16:49,006 INFO L226 Difference]: Without dead ends: 16959 [2021-12-22 13:16:49,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:16:49,020 INFO L933 BasicCegarLoop]: 1053 mSDtfsCounter, 1691 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 3219 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 3167 SdHoareTripleChecker+Invalid, 3313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:49,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 3167 Invalid, 3313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3219 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 13:16:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16959 states. [2021-12-22 13:16:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16959 to 12600. [2021-12-22 13:16:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12600 states, 11636 states have (on average 1.5632519766242694) internal successors, (18190), 11670 states have internal predecessors, (18190), 733 states have call successors, (733), 199 states have call predecessors, (733), 230 states have return successors, (1006), 762 states have call predecessors, (1006), 731 states have call successors, (1006) [2021-12-22 13:16:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12600 states to 12600 states and 19929 transitions. [2021-12-22 13:16:50,007 INFO L78 Accepts]: Start accepts. Automaton has 12600 states and 19929 transitions. Word has length 190 [2021-12-22 13:16:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:50,008 INFO L470 AbstractCegarLoop]: Abstraction has 12600 states and 19929 transitions. [2021-12-22 13:16:50,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 12600 states and 19929 transitions. [2021-12-22 13:16:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:50,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:50,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:50,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:16:50,022 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash -236513286, now seen corresponding path program 1 times [2021-12-22 13:16:50,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:50,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736970956] [2021-12-22 13:16:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:50,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:50,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:50,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:50,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:50,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:50,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:50,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:50,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736970956] [2021-12-22 13:16:50,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736970956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:50,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:50,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:50,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263196755] [2021-12-22 13:16:50,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:50,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:50,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:50,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:50,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:50,123 INFO L87 Difference]: Start difference. First operand 12600 states and 19929 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:16:53,022 INFO L93 Difference]: Finished difference Result 29786 states and 47788 transitions. [2021-12-22 13:16:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:16:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-22 13:16:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:16:53,072 INFO L225 Difference]: With dead ends: 29786 [2021-12-22 13:16:53,072 INFO L226 Difference]: Without dead ends: 17208 [2021-12-22 13:16:53,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:16:53,097 INFO L933 BasicCegarLoop]: 639 mSDtfsCounter, 1466 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:16:53,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 1443 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:16:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17208 states. [2021-12-22 13:16:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17208 to 12600. [2021-12-22 13:16:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12600 states, 11636 states have (on average 1.5604159504984532) internal successors, (18157), 11670 states have internal predecessors, (18157), 733 states have call successors, (733), 199 states have call predecessors, (733), 230 states have return successors, (1006), 762 states have call predecessors, (1006), 731 states have call successors, (1006) [2021-12-22 13:16:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12600 states to 12600 states and 19896 transitions. [2021-12-22 13:16:54,184 INFO L78 Accepts]: Start accepts. Automaton has 12600 states and 19896 transitions. Word has length 190 [2021-12-22 13:16:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:16:54,185 INFO L470 AbstractCegarLoop]: Abstraction has 12600 states and 19896 transitions. [2021-12-22 13:16:54,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:16:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12600 states and 19896 transitions. [2021-12-22 13:16:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:16:54,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:16:54,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:16:54,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:16:54,191 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:16:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:16:54,191 INFO L85 PathProgramCache]: Analyzing trace with hash 108314876, now seen corresponding path program 1 times [2021-12-22 13:16:54,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:16:54,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287753547] [2021-12-22 13:16:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:16:54,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:16:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:54,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:16:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:54,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:16:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:16:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:54,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:16:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:54,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:16:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:16:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:16:54,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:16:54,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287753547] [2021-12-22 13:16:54,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287753547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:16:54,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:16:54,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:16:54,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119135069] [2021-12-22 13:16:54,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:16:54,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:16:54,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:16:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:16:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:16:54,296 INFO L87 Difference]: Start difference. First operand 12600 states and 19896 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:17:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:17:00,679 INFO L93 Difference]: Finished difference Result 45709 states and 72981 transitions. [2021-12-22 13:17:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:17:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-22 13:17:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:17:00,758 INFO L225 Difference]: With dead ends: 45709 [2021-12-22 13:17:00,758 INFO L226 Difference]: Without dead ends: 33131 [2021-12-22 13:17:00,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:17:00,785 INFO L933 BasicCegarLoop]: 1042 mSDtfsCounter, 1683 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 3156 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:17:00,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1703 Valid, 3156 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 13:17:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33131 states. [2021-12-22 13:17:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33131 to 24858. [2021-12-22 13:17:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24858 states, 22966 states have (on average 1.5585212923452059) internal successors, (35793), 23032 states have internal predecessors, (35793), 1437 states have call successors, (1437), 391 states have call predecessors, (1437), 454 states have return successors, (2228), 1498 states have call predecessors, (2228), 1435 states have call successors, (2228) [2021-12-22 13:17:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24858 states to 24858 states and 39458 transitions. [2021-12-22 13:17:02,867 INFO L78 Accepts]: Start accepts. Automaton has 24858 states and 39458 transitions. Word has length 190 [2021-12-22 13:17:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:17:02,868 INFO L470 AbstractCegarLoop]: Abstraction has 24858 states and 39458 transitions. [2021-12-22 13:17:02,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-22 13:17:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 24858 states and 39458 transitions. [2021-12-22 13:17:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-22 13:17:02,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:17:02,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:17:02,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 13:17:02,900 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:17:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:17:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1089269690, now seen corresponding path program 1 times [2021-12-22 13:17:02,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:17:02,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041727848] [2021-12-22 13:17:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:17:02,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:17:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:17:02,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:17:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:17:03,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:17:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:17:03,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:17:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:17:03,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:17:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:17:03,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-22 13:17:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:17:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:17:03,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:17:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041727848] [2021-12-22 13:17:03,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041727848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:17:03,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:17:03,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:17:03,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170907783] [2021-12-22 13:17:03,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:17:03,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:17:03,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:17:03,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:17:03,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:17:03,072 INFO L87 Difference]: Start difference. First operand 24858 states and 39458 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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)