./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:47:44,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:47:44,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:47:44,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:47:44,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:47:44,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:47:44,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:47:44,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:47:44,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:47:44,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:47:44,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:47:44,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:47:44,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:47:44,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:47:44,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:47:44,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:47:44,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:47:44,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:47:44,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:47:44,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:47:44,095 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:47:44,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:47:44,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:47:44,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:47:44,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:47:44,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:47:44,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:47:44,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:47:44,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:47:44,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:47:44,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:47:44,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:47:44,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:47:44,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:47:44,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:47:44,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:47:44,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:47:44,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:47:44,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:47:44,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:47:44,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:47:44,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:47:44,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:47:44,157 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:47:44,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:47:44,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:47:44,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:47:44,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:47:44,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:47:44,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:47:44,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:47:44,165 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:47:44,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:47:44,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:47:44,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:47:44,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:47:44,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:47:44,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:47:44,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:47:44,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:47:44,168 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:47:44,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:47:44,168 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:47:44,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:47:44,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:47:44,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:47:44,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:47:44,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:47:44,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:47:44,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:47:44,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:47:44,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:47:44,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:47:44,171 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:47:44,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:47:44,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:47:44,171 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 [2022-07-22 20:47:44,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:47:44,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:47:44,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:47:44,408 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:47:44,409 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:47:44,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2022-07-22 20:47:44,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a11d01dfe/c4fb4704e6c1471d89a717c7353a6fd6/FLAGa750a1188 [2022-07-22 20:47:44,983 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:47:44,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2022-07-22 20:47:44,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a11d01dfe/c4fb4704e6c1471d89a717c7353a6fd6/FLAGa750a1188 [2022-07-22 20:47:45,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a11d01dfe/c4fb4704e6c1471d89a717c7353a6fd6 [2022-07-22 20:47:45,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:47:45,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:47:45,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:47:45,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:47:45,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:47:45,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c1044b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45, skipping insertion in model container [2022-07-22 20:47:45,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:47:45,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:47:45,680 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_2.cil-1+token_ring.05.cil-2.c[914,927] [2022-07-22 20:47:45,721 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_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2022-07-22 20:47:45,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:47:45,774 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:47:45,784 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_2.cil-1+token_ring.05.cil-2.c[914,927] [2022-07-22 20:47:45,799 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_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2022-07-22 20:47:45,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:47:45,861 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:47:45,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45 WrapperNode [2022-07-22 20:47:45,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:47:45,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:47:45,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:47:45,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:47:45,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,928 INFO L137 Inliner]: procedures = 63, calls = 73, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 639 [2022-07-22 20:47:45,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:47:45,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:47:45,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:47:45,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:47:45,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:45,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:47:45,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:47:45,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:47:45,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:47:46,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (1/1) ... [2022-07-22 20:47:46,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:47:46,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:47:46,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 20:47:46,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 20:47:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:47:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-22 20:47:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-22 20:47:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-07-22 20:47:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-07-22 20:47:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-22 20:47:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-22 20:47:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-22 20:47:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-22 20:47:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-07-22 20:47:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-07-22 20:47:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-22 20:47:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-22 20:47:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-22 20:47:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-22 20:47:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-07-22 20:47:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-07-22 20:47:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-07-22 20:47:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-07-22 20:47:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-07-22 20:47:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-07-22 20:47:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-22 20:47:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-22 20:47:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:47:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-22 20:47:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-22 20:47:46,077 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-07-22 20:47:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-07-22 20:47:46,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:47:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:47:46,077 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-22 20:47:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-22 20:47:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-22 20:47:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-22 20:47:46,266 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:47:46,272 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:47:46,868 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:47:46,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:47:46,882 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2022-07-22 20:47:46,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:47:46 BoogieIcfgContainer [2022-07-22 20:47:46,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:47:46,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:47:46,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:47:46,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:47:46,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:47:45" (1/3) ... [2022-07-22 20:47:46,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671b2eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:47:46, skipping insertion in model container [2022-07-22 20:47:46,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:47:45" (2/3) ... [2022-07-22 20:47:46,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671b2eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:47:46, skipping insertion in model container [2022-07-22 20:47:46,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:47:46" (3/3) ... [2022-07-22 20:47:46,895 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2022-07-22 20:47:46,908 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:47:46,909 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:47:46,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:47:46,986 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c3db053, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20c1a2e2 [2022-07-22 20:47:46,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:47:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 316 states, 263 states have (on average 1.6045627376425855) internal successors, (422), 271 states have internal predecessors, (422), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 20:47:47,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:47:47,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:47,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:47,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1403612633, now seen corresponding path program 1 times [2022-07-22 20:47:47,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:47,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393171725] [2022-07-22 20:47:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:47,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:47,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:47,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:47,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:47,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:47,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:47,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:47,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:47,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393171725] [2022-07-22 20:47:47,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393171725] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:47,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:47,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:47:47,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246761392] [2022-07-22 20:47:47,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:47,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:47:47,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:47,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:47:47,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:47:47,296 INFO L87 Difference]: Start difference. First operand has 316 states, 263 states have (on average 1.6045627376425855) internal successors, (422), 271 states have internal predecessors, (422), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-07-22 20:47:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:47,813 INFO L93 Difference]: Finished difference Result 628 states and 977 transitions. [2022-07-22 20:47:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 20:47:47,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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 65 [2022-07-22 20:47:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:47,827 INFO L225 Difference]: With dead ends: 628 [2022-07-22 20:47:47,827 INFO L226 Difference]: Without dead ends: 323 [2022-07-22 20:47:47,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:47:47,834 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 474 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:47,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1250 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 20:47:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-22 20:47:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 305. [2022-07-22 20:47:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 255 states have (on average 1.5098039215686274) internal successors, (385), 260 states have internal predecessors, (385), 35 states have call successors, (35), 15 states have call predecessors, (35), 13 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-22 20:47:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 451 transitions. [2022-07-22 20:47:47,920 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 451 transitions. Word has length 65 [2022-07-22 20:47:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:47,923 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 451 transitions. [2022-07-22 20:47:47,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-07-22 20:47:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 451 transitions. [2022-07-22 20:47:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:47:47,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:47,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:47,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:47:47,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash 16827223, now seen corresponding path program 1 times [2022-07-22 20:47:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:47,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979085378] [2022-07-22 20:47:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:47,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:48,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:48,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:48,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:48,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:48,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:48,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:48,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:48,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979085378] [2022-07-22 20:47:48,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979085378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:48,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:48,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:47:48,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502961427] [2022-07-22 20:47:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:48,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:47:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:48,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:47:48,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:47:48,097 INFO L87 Difference]: Start difference. First operand 305 states and 451 transitions. 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) [2022-07-22 20:47:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:48,981 INFO L93 Difference]: Finished difference Result 528 states and 765 transitions. [2022-07-22 20:47:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:47:48,982 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 [2022-07-22 20:47:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:48,986 INFO L225 Difference]: With dead ends: 528 [2022-07-22 20:47:48,986 INFO L226 Difference]: Without dead ends: 440 [2022-07-22 20:47:48,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:47:48,989 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 569 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:48,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 1699 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:47:48,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-22 20:47:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 401. [2022-07-22 20:47:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 331 states have (on average 1.4773413897280967) internal successors, (489), 338 states have internal predecessors, (489), 46 states have call successors, (46), 22 states have call predecessors, (46), 22 states have return successors, (47), 43 states have call predecessors, (47), 42 states have call successors, (47) [2022-07-22 20:47:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 582 transitions. [2022-07-22 20:47:49,022 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 582 transitions. Word has length 65 [2022-07-22 20:47:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:49,023 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 582 transitions. [2022-07-22 20:47:49,023 INFO L496 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) [2022-07-22 20:47:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 582 transitions. [2022-07-22 20:47:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:47:49,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:49,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:49,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:47:49,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1695715863, now seen corresponding path program 1 times [2022-07-22 20:47:49,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:49,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582443297] [2022-07-22 20:47:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:49,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:49,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:49,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:49,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:49,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:49,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:49,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:49,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:49,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:49,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582443297] [2022-07-22 20:47:49,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582443297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:49,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:49,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:47:49,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615480861] [2022-07-22 20:47:49,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:49,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:47:49,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:47:49,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:47:49,169 INFO L87 Difference]: Start difference. First operand 401 states and 582 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 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) [2022-07-22 20:47:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:50,114 INFO L93 Difference]: Finished difference Result 748 states and 1058 transitions. [2022-07-22 20:47:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 20:47:50,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 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 [2022-07-22 20:47:50,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:50,119 INFO L225 Difference]: With dead ends: 748 [2022-07-22 20:47:50,119 INFO L226 Difference]: Without dead ends: 571 [2022-07-22 20:47:50,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-22 20:47:50,121 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 865 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:50,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 1799 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:47:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-07-22 20:47:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 497. [2022-07-22 20:47:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 407 states have (on average 1.4545454545454546) internal successors, (592), 416 states have internal predecessors, (592), 57 states have call successors, (57), 29 states have call predecessors, (57), 31 states have return successors, (66), 55 states have call predecessors, (66), 53 states have call successors, (66) [2022-07-22 20:47:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 715 transitions. [2022-07-22 20:47:50,153 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 715 transitions. Word has length 65 [2022-07-22 20:47:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:50,153 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 715 transitions. [2022-07-22 20:47:50,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 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) [2022-07-22 20:47:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 715 transitions. [2022-07-22 20:47:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:47:50,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:50,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:50,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:47:50,157 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:50,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:50,158 INFO L85 PathProgramCache]: Analyzing trace with hash -332870247, now seen corresponding path program 1 times [2022-07-22 20:47:50,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:50,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815018055] [2022-07-22 20:47:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:50,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:50,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:50,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:50,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:50,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:50,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:50,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:50,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815018055] [2022-07-22 20:47:50,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815018055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:50,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:50,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:47:50,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701376917] [2022-07-22 20:47:50,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:50,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:47:50,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:47:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:47:50,305 INFO L87 Difference]: Start difference. First operand 497 states and 715 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-07-22 20:47:51,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:51,139 INFO L93 Difference]: Finished difference Result 798 states and 1129 transitions. [2022-07-22 20:47:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 20:47:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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 65 [2022-07-22 20:47:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:51,143 INFO L225 Difference]: With dead ends: 798 [2022-07-22 20:47:51,143 INFO L226 Difference]: Without dead ends: 531 [2022-07-22 20:47:51,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:47:51,145 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 372 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:51,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1984 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:47:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-22 20:47:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 502. [2022-07-22 20:47:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 411 states have (on average 1.4452554744525548) internal successors, (594), 420 states have internal predecessors, (594), 57 states have call successors, (57), 29 states have call predecessors, (57), 32 states have return successors, (67), 56 states have call predecessors, (67), 53 states have call successors, (67) [2022-07-22 20:47:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 718 transitions. [2022-07-22 20:47:51,172 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 718 transitions. Word has length 65 [2022-07-22 20:47:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:51,172 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 718 transitions. [2022-07-22 20:47:51,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-07-22 20:47:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 718 transitions. [2022-07-22 20:47:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:47:51,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:51,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:51,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:47:51,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1362229545, now seen corresponding path program 1 times [2022-07-22 20:47:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:51,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965870292] [2022-07-22 20:47:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:51,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:51,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:51,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:51,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:51,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:51,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:51,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:51,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965870292] [2022-07-22 20:47:51,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965870292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:51,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:51,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:47:51,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790982855] [2022-07-22 20:47:51,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:51,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:47:51,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:47:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:47:51,306 INFO L87 Difference]: Start difference. First operand 502 states and 718 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-07-22 20:47:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:52,131 INFO L93 Difference]: Finished difference Result 820 states and 1151 transitions. [2022-07-22 20:47:52,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 20:47:52,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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 65 [2022-07-22 20:47:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:52,139 INFO L225 Difference]: With dead ends: 820 [2022-07-22 20:47:52,139 INFO L226 Difference]: Without dead ends: 548 [2022-07-22 20:47:52,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:47:52,144 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 552 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:52,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1780 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:47:52,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-07-22 20:47:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 517. [2022-07-22 20:47:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 423 states have (on average 1.4326241134751774) internal successors, (606), 432 states have internal predecessors, (606), 57 states have call successors, (57), 29 states have call predecessors, (57), 35 states have return successors, (70), 59 states have call predecessors, (70), 53 states have call successors, (70) [2022-07-22 20:47:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 733 transitions. [2022-07-22 20:47:52,177 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 733 transitions. Word has length 65 [2022-07-22 20:47:52,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:52,177 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 733 transitions. [2022-07-22 20:47:52,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-07-22 20:47:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 733 transitions. [2022-07-22 20:47:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:47:52,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:52,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:52,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:47:52,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash 23973849, now seen corresponding path program 1 times [2022-07-22 20:47:52,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:52,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687755643] [2022-07-22 20:47:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:52,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:52,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:52,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:52,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:52,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:52,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:52,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:52,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:52,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687755643] [2022-07-22 20:47:52,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687755643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:52,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:52,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:47:52,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287210575] [2022-07-22 20:47:52,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:52,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:47:52,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:52,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:47:52,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:47:52,305 INFO L87 Difference]: Start difference. First operand 517 states and 733 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 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) [2022-07-22 20:47:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:53,214 INFO L93 Difference]: Finished difference Result 909 states and 1244 transitions. [2022-07-22 20:47:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 20:47:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 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 [2022-07-22 20:47:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:53,218 INFO L225 Difference]: With dead ends: 909 [2022-07-22 20:47:53,218 INFO L226 Difference]: Without dead ends: 624 [2022-07-22 20:47:53,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-22 20:47:53,220 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 882 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:53,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 1572 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:47:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-07-22 20:47:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 529. [2022-07-22 20:47:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 433 states have (on average 1.4226327944572748) internal successors, (616), 442 states have internal predecessors, (616), 58 states have call successors, (58), 30 states have call predecessors, (58), 36 states have return successors, (69), 60 states have call predecessors, (69), 54 states have call successors, (69) [2022-07-22 20:47:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 743 transitions. [2022-07-22 20:47:53,247 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 743 transitions. Word has length 65 [2022-07-22 20:47:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:53,248 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 743 transitions. [2022-07-22 20:47:53,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 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) [2022-07-22 20:47:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 743 transitions. [2022-07-22 20:47:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:47:53,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:53,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:53,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 20:47:53,250 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash -110039657, now seen corresponding path program 1 times [2022-07-22 20:47:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:53,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173141025] [2022-07-22 20:47:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:53,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:53,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:53,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173141025] [2022-07-22 20:47:53,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173141025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:53,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:53,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:47:53,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530976809] [2022-07-22 20:47:53,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:53,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:47:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:47:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:47:53,325 INFO L87 Difference]: Start difference. First operand 529 states and 743 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 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) [2022-07-22 20:47:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:53,773 INFO L93 Difference]: Finished difference Result 1171 states and 1587 transitions. [2022-07-22 20:47:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 20:47:53,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 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 [2022-07-22 20:47:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:53,778 INFO L225 Difference]: With dead ends: 1171 [2022-07-22 20:47:53,778 INFO L226 Difference]: Without dead ends: 875 [2022-07-22 20:47:53,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:47:53,780 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 1071 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:53,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1097 Valid, 1085 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:47:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-07-22 20:47:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 819. [2022-07-22 20:47:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 657 states have (on average 1.36986301369863) internal successors, (900), 673 states have internal predecessors, (900), 93 states have call successors, (93), 52 states have call predecessors, (93), 67 states have return successors, (126), 100 states have call predecessors, (126), 89 states have call successors, (126) [2022-07-22 20:47:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1119 transitions. [2022-07-22 20:47:53,816 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1119 transitions. Word has length 65 [2022-07-22 20:47:53,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:53,817 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1119 transitions. [2022-07-22 20:47:53,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 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) [2022-07-22 20:47:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1119 transitions. [2022-07-22 20:47:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:47:53,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:53,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:53,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 20:47:53,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1566755896, now seen corresponding path program 1 times [2022-07-22 20:47:53,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:53,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926039243] [2022-07-22 20:47:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:53,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:53,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:53,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926039243] [2022-07-22 20:47:53,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926039243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:53,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:53,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:47:53,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793755505] [2022-07-22 20:47:53,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:53,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:47:53,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:47:53,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:47:53,876 INFO L87 Difference]: Start difference. First operand 819 states and 1119 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:47:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:54,384 INFO L93 Difference]: Finished difference Result 2022 states and 2686 transitions. [2022-07-22 20:47:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:47:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-22 20:47:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:54,392 INFO L225 Difference]: With dead ends: 2022 [2022-07-22 20:47:54,393 INFO L226 Difference]: Without dead ends: 1415 [2022-07-22 20:47:54,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:47:54,395 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 551 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:54,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1244 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 20:47:54,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-07-22 20:47:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1300. [2022-07-22 20:47:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1036 states have (on average 1.334942084942085) internal successors, (1383), 1055 states have internal predecessors, (1383), 138 states have call successors, (138), 96 states have call predecessors, (138), 124 states have return successors, (198), 155 states have call predecessors, (198), 134 states have call successors, (198) [2022-07-22 20:47:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1719 transitions. [2022-07-22 20:47:54,455 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1719 transitions. Word has length 66 [2022-07-22 20:47:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:54,455 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 1719 transitions. [2022-07-22 20:47:54,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:47:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1719 transitions. [2022-07-22 20:47:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:47:54,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:54,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:54,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 20:47:54,458 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:54,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1269971741, now seen corresponding path program 1 times [2022-07-22 20:47:54,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:54,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874260491] [2022-07-22 20:47:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:54,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:54,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:54,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:54,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:54,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:54,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:54,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:54,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:54,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874260491] [2022-07-22 20:47:54,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874260491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:54,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:54,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:47:54,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865797742] [2022-07-22 20:47:54,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:54,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:47:54,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:54,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:47:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:47:54,524 INFO L87 Difference]: Start difference. First operand 1300 states and 1719 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:47:54,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:54,913 INFO L93 Difference]: Finished difference Result 3488 states and 4525 transitions. [2022-07-22 20:47:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 20:47:54,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-22 20:47:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:54,925 INFO L225 Difference]: With dead ends: 3488 [2022-07-22 20:47:54,926 INFO L226 Difference]: Without dead ends: 2420 [2022-07-22 20:47:54,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-22 20:47:54,932 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 1072 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:54,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 884 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 20:47:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-07-22 20:47:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2162. [2022-07-22 20:47:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 1702 states have (on average 1.298472385428907) internal successors, (2210), 1731 states have internal predecessors, (2210), 236 states have call successors, (236), 180 states have call predecessors, (236), 222 states have return successors, (334), 257 states have call predecessors, (334), 232 states have call successors, (334) [2022-07-22 20:47:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 2780 transitions. [2022-07-22 20:47:55,039 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 2780 transitions. Word has length 66 [2022-07-22 20:47:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:55,039 INFO L495 AbstractCegarLoop]: Abstraction has 2162 states and 2780 transitions. [2022-07-22 20:47:55,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:47:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 2780 transitions. [2022-07-22 20:47:55,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 20:47:55,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:55,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:55,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 20:47:55,043 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:55,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1499029609, now seen corresponding path program 1 times [2022-07-22 20:47:55,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:55,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418011417] [2022-07-22 20:47:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:55,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:55,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:55,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418011417] [2022-07-22 20:47:55,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418011417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:55,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:55,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:47:55,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090031203] [2022-07-22 20:47:55,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:55,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:47:55,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:47:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:47:55,113 INFO L87 Difference]: Start difference. First operand 2162 states and 2780 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:47:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:55,537 INFO L93 Difference]: Finished difference Result 5072 states and 6430 transitions. [2022-07-22 20:47:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:47:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-07-22 20:47:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:55,552 INFO L225 Difference]: With dead ends: 5072 [2022-07-22 20:47:55,553 INFO L226 Difference]: Without dead ends: 3142 [2022-07-22 20:47:55,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:47:55,558 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 1053 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:55,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 920 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 20:47:55,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2022-07-22 20:47:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 2894. [2022-07-22 20:47:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2270 states have (on average 1.2837004405286343) internal successors, (2914), 2307 states have internal predecessors, (2914), 316 states have call successors, (316), 250 states have call predecessors, (316), 306 states have return successors, (443), 343 states have call predecessors, (443), 312 states have call successors, (443) [2022-07-22 20:47:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 3673 transitions. [2022-07-22 20:47:55,687 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 3673 transitions. Word has length 72 [2022-07-22 20:47:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:55,688 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 3673 transitions. [2022-07-22 20:47:55,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:47:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 3673 transitions. [2022-07-22 20:47:55,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 20:47:55,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:55,691 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:55,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:47:55,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash 258278453, now seen corresponding path program 1 times [2022-07-22 20:47:55,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613695519] [2022-07-22 20:47:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:55,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:55,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613695519] [2022-07-22 20:47:55,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613695519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:55,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:55,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:47:55,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357958769] [2022-07-22 20:47:55,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:55,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:47:55,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:47:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:47:55,762 INFO L87 Difference]: Start difference. First operand 2894 states and 3673 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-22 20:47:56,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:56,244 INFO L93 Difference]: Finished difference Result 3668 states and 4604 transitions. [2022-07-22 20:47:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 20:47:56,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2022-07-22 20:47:56,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:56,263 INFO L225 Difference]: With dead ends: 3668 [2022-07-22 20:47:56,264 INFO L226 Difference]: Without dead ends: 3665 [2022-07-22 20:47:56,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:47:56,268 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 1499 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:56,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1509 Valid, 898 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:47:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2022-07-22 20:47:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3388. [2022-07-22 20:47:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 2655 states have (on average 1.2753295668549907) internal successors, (3386), 2697 states have internal predecessors, (3386), 366 states have call successors, (366), 294 states have call predecessors, (366), 365 states have return successors, (522), 403 states have call predecessors, (522), 363 states have call successors, (522) [2022-07-22 20:47:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 4274 transitions. [2022-07-22 20:47:56,474 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 4274 transitions. Word has length 73 [2022-07-22 20:47:56,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:56,475 INFO L495 AbstractCegarLoop]: Abstraction has 3388 states and 4274 transitions. [2022-07-22 20:47:56,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-22 20:47:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 4274 transitions. [2022-07-22 20:47:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 20:47:56,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:56,477 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 20:47:56,477 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash -584250463, now seen corresponding path program 1 times [2022-07-22 20:47:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:56,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371657094] [2022-07-22 20:47:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:56,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:56,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:56,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:56,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:56,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:56,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:56,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:56,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:56,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:56,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371657094] [2022-07-22 20:47:56,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371657094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:47:56,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26615658] [2022-07-22 20:47:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:56,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:47:56,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:47:56,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:47:56,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:47:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:56,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 20:47:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:47:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:57,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:47:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:57,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26615658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:47:57,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:47:57,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2022-07-22 20:47:57,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847068391] [2022-07-22 20:47:57,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:47:57,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 20:47:57,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 20:47:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 20:47:57,205 INFO L87 Difference]: Start difference. First operand 3388 states and 4274 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-22 20:47:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:58,960 INFO L93 Difference]: Finished difference Result 7829 states and 9760 transitions. [2022-07-22 20:47:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 20:47:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2022-07-22 20:47:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:58,996 INFO L225 Difference]: With dead ends: 7829 [2022-07-22 20:47:58,997 INFO L226 Difference]: Without dead ends: 7826 [2022-07-22 20:47:59,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-07-22 20:47:59,003 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 1299 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:59,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 2276 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:47:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2022-07-22 20:47:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 5178. [2022-07-22 20:47:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 4059 states have (on average 1.271741808327174) internal successors, (5162), 4123 states have internal predecessors, (5162), 550 states have call successors, (550), 452 states have call predecessors, (550), 567 states have return successors, (800), 609 states have call predecessors, (800), 547 states have call successors, (800) [2022-07-22 20:47:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 6512 transitions. [2022-07-22 20:47:59,362 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 6512 transitions. Word has length 74 [2022-07-22 20:47:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:59,362 INFO L495 AbstractCegarLoop]: Abstraction has 5178 states and 6512 transitions. [2022-07-22 20:47:59,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-22 20:47:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 6512 transitions. [2022-07-22 20:47:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 20:47:59,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:59,365 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:59,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 20:47:59,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 20:47:59,579 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash 957331893, now seen corresponding path program 2 times [2022-07-22 20:47:59,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:59,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145295111] [2022-07-22 20:47:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:59,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:59,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:59,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:47:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:59,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:47:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:59,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:47:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:59,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:47:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:59,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:47:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:59,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:47:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:59,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:59,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145295111] [2022-07-22 20:47:59,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145295111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:59,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:59,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:47:59,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157276762] [2022-07-22 20:47:59,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:59,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:47:59,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:59,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:47:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:47:59,636 INFO L87 Difference]: Start difference. First operand 5178 states and 6512 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-22 20:48:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:00,137 INFO L93 Difference]: Finished difference Result 7860 states and 9885 transitions. [2022-07-22 20:48:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 20:48:00,137 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), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2022-07-22 20:48:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:00,156 INFO L225 Difference]: With dead ends: 7860 [2022-07-22 20:48:00,156 INFO L226 Difference]: Without dead ends: 3785 [2022-07-22 20:48:00,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-22 20:48:00,168 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 941 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:00,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 1004 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 20:48:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2022-07-22 20:48:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3550. [2022-07-22 20:48:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 2787 states have (on average 1.2565482597775386) internal successors, (3502), 2829 states have internal predecessors, (3502), 382 states have call successors, (382), 308 states have call predecessors, (382), 379 states have return successors, (526), 419 states have call predecessors, (526), 379 states have call successors, (526) [2022-07-22 20:48:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 4410 transitions. [2022-07-22 20:48:00,431 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 4410 transitions. Word has length 77 [2022-07-22 20:48:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:00,431 INFO L495 AbstractCegarLoop]: Abstraction has 3550 states and 4410 transitions. [2022-07-22 20:48:00,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-22 20:48:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 4410 transitions. [2022-07-22 20:48:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 20:48:00,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:00,437 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:48:00,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:48:00,438 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1430467283, now seen corresponding path program 1 times [2022-07-22 20:48:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:00,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433845909] [2022-07-22 20:48:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:00,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:00,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:48:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:00,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:48:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:00,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:48:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:00,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:48:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:00,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:48:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:00,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:48:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:00,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-22 20:48:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 20:48:00,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:00,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433845909] [2022-07-22 20:48:00,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433845909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:00,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:00,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:48:00,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553529096] [2022-07-22 20:48:00,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:00,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:48:00,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:00,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:48:00,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:48:00,515 INFO L87 Difference]: Start difference. First operand 3550 states and 4410 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 20:48:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:01,694 INFO L93 Difference]: Finished difference Result 10406 states and 12791 transitions. [2022-07-22 20:48:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 20:48:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2022-07-22 20:48:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:01,727 INFO L225 Difference]: With dead ends: 10406 [2022-07-22 20:48:01,728 INFO L226 Difference]: Without dead ends: 5785 [2022-07-22 20:48:01,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-07-22 20:48:01,741 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 1011 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:01,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 1625 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:48:01,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2022-07-22 20:48:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5465. [2022-07-22 20:48:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 4245 states have (on average 1.2318021201413427) internal successors, (5229), 4330 states have internal predecessors, (5229), 586 states have call successors, (586), 482 states have call predecessors, (586), 632 states have return successors, (908), 659 states have call predecessors, (908), 583 states have call successors, (908) [2022-07-22 20:48:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 6723 transitions. [2022-07-22 20:48:02,102 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 6723 transitions. Word has length 84 [2022-07-22 20:48:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:02,103 INFO L495 AbstractCegarLoop]: Abstraction has 5465 states and 6723 transitions. [2022-07-22 20:48:02,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 20:48:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 6723 transitions. [2022-07-22 20:48:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 20:48:02,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:02,107 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:02,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:48:02,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1891118771, now seen corresponding path program 1 times [2022-07-22 20:48:02,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:02,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117603146] [2022-07-22 20:48:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:02,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:02,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:48:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:02,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:48:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:02,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:48:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:02,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:48:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:02,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:48:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:02,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:48:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:02,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 20:48:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 20:48:02,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:02,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117603146] [2022-07-22 20:48:02,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117603146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:02,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:02,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:48:02,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120127162] [2022-07-22 20:48:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:02,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:48:02,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:48:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:48:02,197 INFO L87 Difference]: Start difference. First operand 5465 states and 6723 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) [2022-07-22 20:48:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:03,496 INFO L93 Difference]: Finished difference Result 9468 states and 11563 transitions. [2022-07-22 20:48:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 20:48:03,497 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 93 [2022-07-22 20:48:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:03,522 INFO L225 Difference]: With dead ends: 9468 [2022-07-22 20:48:03,523 INFO L226 Difference]: Without dead ends: 4875 [2022-07-22 20:48:03,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-07-22 20:48:03,536 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 1444 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:03,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1483 Valid, 1910 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:48:03,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-07-22 20:48:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4541. [2022-07-22 20:48:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4541 states, 3534 states have (on average 1.2246745897000566) internal successors, (4328), 3601 states have internal predecessors, (4328), 487 states have call successors, (487), 397 states have call predecessors, (487), 518 states have return successors, (686), 549 states have call predecessors, (686), 484 states have call successors, (686) [2022-07-22 20:48:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 5501 transitions. [2022-07-22 20:48:03,842 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 5501 transitions. Word has length 93 [2022-07-22 20:48:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:03,843 INFO L495 AbstractCegarLoop]: Abstraction has 4541 states and 5501 transitions. [2022-07-22 20:48:03,843 INFO L496 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) [2022-07-22 20:48:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 5501 transitions. [2022-07-22 20:48:03,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:03,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:03,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:03,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:48:03,848 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash 299410466, now seen corresponding path program 1 times [2022-07-22 20:48:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:03,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448951456] [2022-07-22 20:48:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:03,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:03,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:03,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:03,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:03,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:03,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:03,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448951456] [2022-07-22 20:48:03,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448951456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:03,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:03,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:48:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775457322] [2022-07-22 20:48:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:03,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:48:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:03,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:48:03,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:48:03,927 INFO L87 Difference]: Start difference. First operand 4541 states and 5501 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-07-22 20:48:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:04,837 INFO L93 Difference]: Finished difference Result 4805 states and 5917 transitions. [2022-07-22 20:48:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:48:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:04,850 INFO L225 Difference]: With dead ends: 4805 [2022-07-22 20:48:04,851 INFO L226 Difference]: Without dead ends: 4606 [2022-07-22 20:48:04,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:48:04,853 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 617 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:04,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 868 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 20:48:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4606 states. [2022-07-22 20:48:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4606 to 4541. [2022-07-22 20:48:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4541 states, 3534 states have (on average 1.2243916242218449) internal successors, (4327), 3601 states have internal predecessors, (4327), 487 states have call successors, (487), 397 states have call predecessors, (487), 518 states have return successors, (686), 549 states have call predecessors, (686), 484 states have call successors, (686) [2022-07-22 20:48:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 5500 transitions. [2022-07-22 20:48:05,187 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 5500 transitions. Word has length 102 [2022-07-22 20:48:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:05,188 INFO L495 AbstractCegarLoop]: Abstraction has 4541 states and 5500 transitions. [2022-07-22 20:48:05,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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) [2022-07-22 20:48:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 5500 transitions. [2022-07-22 20:48:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:05,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:05,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:05,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 20:48:05,192 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1577652764, now seen corresponding path program 1 times [2022-07-22 20:48:05,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:05,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047762857] [2022-07-22 20:48:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:05,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:05,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:05,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:05,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:05,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:05,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:05,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:05,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047762857] [2022-07-22 20:48:05,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047762857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:05,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:05,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:48:05,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749939363] [2022-07-22 20:48:05,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:05,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:48:05,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:05,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:48:05,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:48:05,271 INFO L87 Difference]: Start difference. First operand 4541 states and 5500 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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) [2022-07-22 20:48:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:06,680 INFO L93 Difference]: Finished difference Result 5067 states and 6331 transitions. [2022-07-22 20:48:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:48:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:06,691 INFO L225 Difference]: With dead ends: 5067 [2022-07-22 20:48:06,691 INFO L226 Difference]: Without dead ends: 4871 [2022-07-22 20:48:06,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:48:06,693 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 986 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:06,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 1183 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:48:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2022-07-22 20:48:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4740. [2022-07-22 20:48:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 3712 states have (on average 1.2408405172413792) internal successors, (4606), 3780 states have internal predecessors, (4606), 501 states have call successors, (501), 403 states have call predecessors, (501), 525 states have return successors, (703), 563 states have call predecessors, (703), 498 states have call successors, (703) [2022-07-22 20:48:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 5810 transitions. [2022-07-22 20:48:06,987 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 5810 transitions. Word has length 102 [2022-07-22 20:48:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:06,987 INFO L495 AbstractCegarLoop]: Abstraction has 4740 states and 5810 transitions. [2022-07-22 20:48:06,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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) [2022-07-22 20:48:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 5810 transitions. [2022-07-22 20:48:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:06,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:06,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:06,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 20:48:06,992 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:06,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1033499360, now seen corresponding path program 1 times [2022-07-22 20:48:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:06,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562935447] [2022-07-22 20:48:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:06,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:07,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:07,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:07,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:07,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:07,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:07,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562935447] [2022-07-22 20:48:07,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562935447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:07,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:07,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:07,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131201743] [2022-07-22 20:48:07,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:07,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:07,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:07,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:07,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:07,085 INFO L87 Difference]: Start difference. First operand 4740 states and 5810 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:08,824 INFO L93 Difference]: Finished difference Result 5537 states and 7068 transitions. [2022-07-22 20:48:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:48:08,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:08,842 INFO L225 Difference]: With dead ends: 5537 [2022-07-22 20:48:08,843 INFO L226 Difference]: Without dead ends: 5142 [2022-07-22 20:48:08,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:48:08,847 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 990 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1909 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:08,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 1909 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 20:48:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5142 states. [2022-07-22 20:48:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5142 to 4927. [2022-07-22 20:48:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 3878 states have (on average 1.2534811758638473) internal successors, (4861), 3947 states have internal predecessors, (4861), 515 states have call successors, (515), 409 states have call predecessors, (515), 532 states have return successors, (719), 578 states have call predecessors, (719), 512 states have call successors, (719) [2022-07-22 20:48:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 6095 transitions. [2022-07-22 20:48:09,184 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 6095 transitions. Word has length 102 [2022-07-22 20:48:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:09,184 INFO L495 AbstractCegarLoop]: Abstraction has 4927 states and 6095 transitions. [2022-07-22 20:48:09,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 6095 transitions. [2022-07-22 20:48:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:09,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:09,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:09,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 20:48:09,188 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash -845631586, now seen corresponding path program 1 times [2022-07-22 20:48:09,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:09,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199997246] [2022-07-22 20:48:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:09,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:09,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:09,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:09,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:09,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:09,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:09,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199997246] [2022-07-22 20:48:09,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199997246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:09,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:09,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467434443] [2022-07-22 20:48:09,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:09,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:09,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:09,270 INFO L87 Difference]: Start difference. First operand 4927 states and 6095 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:11,016 INFO L93 Difference]: Finished difference Result 6227 states and 8141 transitions. [2022-07-22 20:48:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:48:11,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:11,032 INFO L225 Difference]: With dead ends: 6227 [2022-07-22 20:48:11,032 INFO L226 Difference]: Without dead ends: 5645 [2022-07-22 20:48:11,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:48:11,037 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 985 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:11,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 1902 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 20:48:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5645 states. [2022-07-22 20:48:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5645 to 5304. [2022-07-22 20:48:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5304 states, 4213 states have (on average 1.2760503204367435) internal successors, (5376), 4284 states have internal predecessors, (5376), 543 states have call successors, (543), 421 states have call predecessors, (543), 546 states have return successors, (755), 608 states have call predecessors, (755), 540 states have call successors, (755) [2022-07-22 20:48:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5304 states to 5304 states and 6674 transitions. [2022-07-22 20:48:11,393 INFO L78 Accepts]: Start accepts. Automaton has 5304 states and 6674 transitions. Word has length 102 [2022-07-22 20:48:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:11,393 INFO L495 AbstractCegarLoop]: Abstraction has 5304 states and 6674 transitions. [2022-07-22 20:48:11,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:11,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5304 states and 6674 transitions. [2022-07-22 20:48:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:11,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:11,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:11,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 20:48:11,400 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash 479224608, now seen corresponding path program 1 times [2022-07-22 20:48:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020830726] [2022-07-22 20:48:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:11,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:11,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:11,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:11,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:11,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:11,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:11,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020830726] [2022-07-22 20:48:11,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020830726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:11,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:11,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:11,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162297435] [2022-07-22 20:48:11,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:11,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:11,490 INFO L87 Difference]: Start difference. First operand 5304 states and 6674 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:13,137 INFO L93 Difference]: Finished difference Result 7566 states and 10220 transitions. [2022-07-22 20:48:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:48:13,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:13,159 INFO L225 Difference]: With dead ends: 7566 [2022-07-22 20:48:13,159 INFO L226 Difference]: Without dead ends: 6607 [2022-07-22 20:48:13,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:48:13,167 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 984 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:13,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 1897 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:48:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6607 states. [2022-07-22 20:48:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6607 to 6061. [2022-07-22 20:48:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6061 states, 4886 states have (on average 1.3119115841178879) internal successors, (6410), 4961 states have internal predecessors, (6410), 599 states have call successors, (599), 445 states have call predecessors, (599), 574 states have return successors, (833), 668 states have call predecessors, (833), 596 states have call successors, (833) [2022-07-22 20:48:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6061 states to 6061 states and 7842 transitions. [2022-07-22 20:48:13,643 INFO L78 Accepts]: Start accepts. Automaton has 6061 states and 7842 transitions. Word has length 102 [2022-07-22 20:48:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:13,644 INFO L495 AbstractCegarLoop]: Abstraction has 6061 states and 7842 transitions. [2022-07-22 20:48:13,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 6061 states and 7842 transitions. [2022-07-22 20:48:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:13,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:13,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:13,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 20:48:13,650 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:13,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2045982558, now seen corresponding path program 1 times [2022-07-22 20:48:13,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:13,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612326906] [2022-07-22 20:48:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:13,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:13,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:13,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:13,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:13,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:13,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:13,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:13,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612326906] [2022-07-22 20:48:13,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612326906] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:13,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:13,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:13,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52470395] [2022-07-22 20:48:13,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:13,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:13,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:13,765 INFO L87 Difference]: Start difference. First operand 6061 states and 7842 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:15,593 INFO L93 Difference]: Finished difference Result 10245 states and 14398 transitions. [2022-07-22 20:48:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:48:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:15,619 INFO L225 Difference]: With dead ends: 10245 [2022-07-22 20:48:15,620 INFO L226 Difference]: Without dead ends: 8529 [2022-07-22 20:48:15,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:48:15,630 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 983 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:15,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 1892 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 20:48:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8529 states. [2022-07-22 20:48:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8529 to 7582. [2022-07-22 20:48:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 6239 states have (on average 1.36047443500561) internal successors, (8488), 6322 states have internal predecessors, (8488), 711 states have call successors, (711), 493 states have call predecessors, (711), 630 states have return successors, (1007), 788 states have call predecessors, (1007), 708 states have call successors, (1007) [2022-07-22 20:48:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 10206 transitions. [2022-07-22 20:48:16,170 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 10206 transitions. Word has length 102 [2022-07-22 20:48:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:16,170 INFO L495 AbstractCegarLoop]: Abstraction has 7582 states and 10206 transitions. [2022-07-22 20:48:16,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 10206 transitions. [2022-07-22 20:48:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:16,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:16,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:16,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 20:48:16,178 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash 988144480, now seen corresponding path program 1 times [2022-07-22 20:48:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:16,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514153917] [2022-07-22 20:48:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:16,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:16,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:16,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:16,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:16,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:16,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:16,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:16,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514153917] [2022-07-22 20:48:16,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514153917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:16,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:16,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:16,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068630128] [2022-07-22 20:48:16,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:16,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:16,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:16,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:16,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:16,260 INFO L87 Difference]: Start difference. First operand 7582 states and 10206 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:18,439 INFO L93 Difference]: Finished difference Result 16868 states and 24706 transitions. [2022-07-22 20:48:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:48:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:18,486 INFO L225 Difference]: With dead ends: 16868 [2022-07-22 20:48:18,486 INFO L226 Difference]: Without dead ends: 13631 [2022-07-22 20:48:18,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:48:18,505 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1035 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:18,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 1965 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 20:48:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13631 states. [2022-07-22 20:48:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13631 to 10591. [2022-07-22 20:48:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10591 states, 8928 states have (on average 1.4150985663082438) internal successors, (12634), 9027 states have internal predecessors, (12634), 919 states have call successors, (919), 589 states have call predecessors, (919), 742 states have return successors, (1393), 1012 states have call predecessors, (1393), 916 states have call successors, (1393) [2022-07-22 20:48:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10591 states to 10591 states and 14946 transitions. [2022-07-22 20:48:19,192 INFO L78 Accepts]: Start accepts. Automaton has 10591 states and 14946 transitions. Word has length 102 [2022-07-22 20:48:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:19,192 INFO L495 AbstractCegarLoop]: Abstraction has 10591 states and 14946 transitions. [2022-07-22 20:48:19,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 10591 states and 14946 transitions. [2022-07-22 20:48:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:19,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:19,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:19,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 20:48:19,203 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:19,203 INFO L85 PathProgramCache]: Analyzing trace with hash -154357986, now seen corresponding path program 1 times [2022-07-22 20:48:19,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:19,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089734835] [2022-07-22 20:48:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:19,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:19,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:19,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:19,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:19,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:19,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:19,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:19,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089734835] [2022-07-22 20:48:19,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089734835] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:19,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:19,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:19,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795601932] [2022-07-22 20:48:19,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:19,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:19,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:19,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:19,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:19,276 INFO L87 Difference]: Start difference. First operand 10591 states and 14946 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:21,934 INFO L93 Difference]: Finished difference Result 28323 states and 42824 transitions. [2022-07-22 20:48:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:48:21,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:22,007 INFO L225 Difference]: With dead ends: 28323 [2022-07-22 20:48:22,007 INFO L226 Difference]: Without dead ends: 22077 [2022-07-22 20:48:22,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:48:22,041 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 1154 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:22,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 1868 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 20:48:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22077 states. [2022-07-22 20:48:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22077 to 16272. [2022-07-22 20:48:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16272 states, 13985 states have (on average 1.4561315695387915) internal successors, (20364), 14116 states have internal predecessors, (20364), 1319 states have call successors, (1319), 781 states have call predecessors, (1319), 966 states have return successors, (2311), 1444 states have call predecessors, (2311), 1316 states have call successors, (2311) [2022-07-22 20:48:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16272 states to 16272 states and 23994 transitions. [2022-07-22 20:48:23,236 INFO L78 Accepts]: Start accepts. Automaton has 16272 states and 23994 transitions. Word has length 102 [2022-07-22 20:48:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:23,237 INFO L495 AbstractCegarLoop]: Abstraction has 16272 states and 23994 transitions. [2022-07-22 20:48:23,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 16272 states and 23994 transitions. [2022-07-22 20:48:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:23,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:23,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:23,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 20:48:23,250 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash 85881760, now seen corresponding path program 1 times [2022-07-22 20:48:23,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:23,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073477132] [2022-07-22 20:48:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:23,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:23,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:23,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:23,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:23,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:23,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:23,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073477132] [2022-07-22 20:48:23,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073477132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:23,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:23,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:23,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288477037] [2022-07-22 20:48:23,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:23,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:23,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:23,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:23,340 INFO L87 Difference]: Start difference. First operand 16272 states and 23994 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:26,962 INFO L93 Difference]: Finished difference Result 49682 states and 77006 transitions. [2022-07-22 20:48:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:48:26,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:27,090 INFO L225 Difference]: With dead ends: 49682 [2022-07-22 20:48:27,090 INFO L226 Difference]: Without dead ends: 37755 [2022-07-22 20:48:27,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:48:27,131 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 1016 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:27,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 1925 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 20:48:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37755 states. [2022-07-22 20:48:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37755 to 27921. [2022-07-22 20:48:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27921 states, 24418 states have (on average 1.4919321811778197) internal successors, (36430), 24613 states have internal predecessors, (36430), 2087 states have call successors, (2087), 1165 states have call predecessors, (2087), 1414 states have return successors, (4601), 2276 states have call predecessors, (4601), 2084 states have call successors, (4601) [2022-07-22 20:48:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27921 states to 27921 states and 43118 transitions. [2022-07-22 20:48:29,109 INFO L78 Accepts]: Start accepts. Automaton has 27921 states and 43118 transitions. Word has length 102 [2022-07-22 20:48:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:29,109 INFO L495 AbstractCegarLoop]: Abstraction has 27921 states and 43118 transitions. [2022-07-22 20:48:29,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 27921 states and 43118 transitions. [2022-07-22 20:48:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:29,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:29,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:29,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 20:48:29,133 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash 924915422, now seen corresponding path program 1 times [2022-07-22 20:48:29,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:29,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250552430] [2022-07-22 20:48:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:29,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:29,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:29,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:29,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:29,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:29,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:29,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:29,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250552430] [2022-07-22 20:48:29,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250552430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:29,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:29,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37986885] [2022-07-22 20:48:29,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:29,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:29,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:29,218 INFO L87 Difference]: Start difference. First operand 27921 states and 43118 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:34,580 INFO L93 Difference]: Finished difference Result 90191 states and 144272 transitions. [2022-07-22 20:48:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:48:34,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:34,974 INFO L225 Difference]: With dead ends: 90191 [2022-07-22 20:48:34,974 INFO L226 Difference]: Without dead ends: 66615 [2022-07-22 20:48:35,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:48:35,044 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 1035 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:35,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 1856 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1643 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:48:35,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66615 states. [2022-07-22 20:48:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66615 to 51283. [2022-07-22 20:48:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51283 states, 45412 states have (on average 1.5168237470272175) internal successors, (68882), 45735 states have internal predecessors, (68882), 3559 states have call successors, (3559), 1933 states have call predecessors, (3559), 2310 states have return successors, (10575), 3876 states have call predecessors, (10575), 3556 states have call successors, (10575) [2022-07-22 20:48:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51283 states to 51283 states and 83016 transitions. [2022-07-22 20:48:38,522 INFO L78 Accepts]: Start accepts. Automaton has 51283 states and 83016 transitions. Word has length 102 [2022-07-22 20:48:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:38,522 INFO L495 AbstractCegarLoop]: Abstraction has 51283 states and 83016 transitions. [2022-07-22 20:48:38,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 51283 states and 83016 transitions. [2022-07-22 20:48:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:38,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:38,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:38,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 20:48:38,561 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:38,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1152421476, now seen corresponding path program 1 times [2022-07-22 20:48:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:38,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642426824] [2022-07-22 20:48:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:38,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:38,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:38,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:38,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:38,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:38,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:38,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:38,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642426824] [2022-07-22 20:48:38,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642426824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:38,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:38,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:38,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276530618] [2022-07-22 20:48:38,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:38,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:38,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:38,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:38,642 INFO L87 Difference]: Start difference. First operand 51283 states and 83016 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:47,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:48:47,876 INFO L93 Difference]: Finished difference Result 170895 states and 283944 transitions. [2022-07-22 20:48:47,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:48:47,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2022-07-22 20:48:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:48:48,439 INFO L225 Difference]: With dead ends: 170895 [2022-07-22 20:48:48,439 INFO L226 Difference]: Without dead ends: 123957 [2022-07-22 20:48:48,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:48:48,548 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 980 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:48:48,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1864 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 20:48:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123957 states. [2022-07-22 20:48:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123957 to 97876. [2022-07-22 20:48:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97876 states, 87397 states have (on average 1.5321807384692838) internal successors, (133908), 87976 states have internal predecessors, (133908), 6375 states have call successors, (6375), 3469 states have call predecessors, (6375), 4102 states have return successors, (26769), 6948 states have call predecessors, (26769), 6372 states have call successors, (26769) [2022-07-22 20:48:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97876 states to 97876 states and 167052 transitions. [2022-07-22 20:48:55,371 INFO L78 Accepts]: Start accepts. Automaton has 97876 states and 167052 transitions. Word has length 102 [2022-07-22 20:48:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:48:55,371 INFO L495 AbstractCegarLoop]: Abstraction has 97876 states and 167052 transitions. [2022-07-22 20:48:55,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2022-07-22 20:48:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 97876 states and 167052 transitions. [2022-07-22 20:48:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 20:48:55,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:48:55,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:48:55,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 20:48:55,423 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:48:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:48:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 581682974, now seen corresponding path program 1 times [2022-07-22 20:48:55,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:48:55,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052533362] [2022-07-22 20:48:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:48:55,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:48:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:55,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:48:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:55,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 20:48:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:55,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 20:48:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:55,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 20:48:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:55,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 20:48:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:48:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:48:55,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:48:55,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052533362] [2022-07-22 20:48:55,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052533362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:48:55,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:48:55,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:48:55,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698760763] [2022-07-22 20:48:55,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:48:55,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:48:55,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:48:55,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:48:55,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:48:55,502 INFO L87 Difference]: Start difference. First operand 97876 states and 167052 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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)