./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.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_3.cil+token_ring.04.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 bd466f23ab481babcc03c4173983e1af9100c535496f2e2f8c8fc18a8aaf4174 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:51:30,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:51:30,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:51:30,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:51:30,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:51:30,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:51:30,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:51:30,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:51:30,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:51:30,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:51:30,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:51:30,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:51:30,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:51:30,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:51:30,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:51:30,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:51:30,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:51:30,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:51:30,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:51:30,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:51:30,093 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:51:30,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:51:30,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:51:30,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:51:30,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:51:30,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:51:30,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:51:30,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:51:30,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:51:30,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:51:30,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:51:30,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:51:30,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:51:30,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:51:30,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:51:30,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:51:30,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:51:30,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:51:30,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:51:30,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:51:30,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:51:30,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:51:30,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:51:30,156 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:51:30,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:51:30,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:51:30,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:51:30,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:51:30,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:51:30,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:51:30,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:51:30,159 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:51:30,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:51:30,161 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:51:30,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:51:30,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:51:30,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:51:30,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:51:30,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:51:30,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:51:30,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:51:30,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:51:30,163 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:51:30,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:51:30,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:51:30,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:51:30,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:51:30,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:51:30,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:51:30,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:51:30,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:51:30,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:51:30,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:51:30,166 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:51:30,166 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:51:30,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:51:30,166 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd466f23ab481babcc03c4173983e1af9100c535496f2e2f8c8fc18a8aaf4174 [2022-07-22 20:51:30,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:51:30,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:51:30,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:51:30,445 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:51:30,445 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:51:30,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c [2022-07-22 20:51:30,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101b80c58/638c7e71e9264353999b17cb2b28f072/FLAG093613dec [2022-07-22 20:51:30,995 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:51:30,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c [2022-07-22 20:51:31,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101b80c58/638c7e71e9264353999b17cb2b28f072/FLAG093613dec [2022-07-22 20:51:31,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101b80c58/638c7e71e9264353999b17cb2b28f072 [2022-07-22 20:51:31,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:51:31,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:51:31,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:51:31,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:51:31,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:51:31,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61dff0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31, skipping insertion in model container [2022-07-22 20:51:31,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:51:31,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:51:31,573 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c[911,924] [2022-07-22 20:51:31,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c[8416,8429] [2022-07-22 20:51:31,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:51:31,672 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:51:31,684 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c[911,924] [2022-07-22 20:51:31,706 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c[8416,8429] [2022-07-22 20:51:31,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:51:31,769 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:51:31,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31 WrapperNode [2022-07-22 20:51:31,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:51:31,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:51:31,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:51:31,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:51:31,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,841 INFO L137 Inliner]: procedures = 63, calls = 74, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 619 [2022-07-22 20:51:31,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:51:31,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:51:31,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:51:31,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:51:31,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:51:31,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:51:31,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:51:31,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:51:31,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (1/1) ... [2022-07-22 20:51:31,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:51:31,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:51:31,933 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 20:51:31,954 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 20:51:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:51:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-22 20:51:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-22 20:51:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-07-22 20:51:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-07-22 20:51:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-22 20:51:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-22 20:51:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-22 20:51:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-22 20:51:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-07-22 20:51:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-07-22 20:51:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-22 20:51:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-22 20:51:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-22 20:51:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-22 20:51:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-07-22 20:51:31,978 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-07-22 20:51:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-07-22 20:51:31,978 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-07-22 20:51:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-07-22 20:51:31,978 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-07-22 20:51:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-22 20:51:31,978 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-22 20:51:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:51:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-22 20:51:31,980 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-22 20:51:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-07-22 20:51:31,980 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-07-22 20:51:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:51:31,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:51:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-22 20:51:31,980 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-22 20:51:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-22 20:51:31,980 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-22 20:51:32,131 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:51:32,133 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:51:32,741 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-07-22 20:51:32,741 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-07-22 20:51:32,800 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:51:32,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:51:32,811 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-22 20:51:32,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:51:32 BoogieIcfgContainer [2022-07-22 20:51:32,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:51:32,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:51:32,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:51:32,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:51:32,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:51:31" (1/3) ... [2022-07-22 20:51:32,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1926d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:51:32, skipping insertion in model container [2022-07-22 20:51:32,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:51:31" (2/3) ... [2022-07-22 20:51:32,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1926d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:51:32, skipping insertion in model container [2022-07-22 20:51:32,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:51:32" (3/3) ... [2022-07-22 20:51:32,820 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.04.cil-2.c [2022-07-22 20:51:32,832 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:51:32,833 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:51:32,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:51:32,889 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@767435a3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14bd9d23 [2022-07-22 20:51:32,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:51:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 253 states have (on average 1.592885375494071) internal successors, (403), 261 states have internal predecessors, (403), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-22 20:51:32,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:51:32,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:32,912 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 20:51:32,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:32,918 INFO L85 PathProgramCache]: Analyzing trace with hash 101820907, now seen corresponding path program 1 times [2022-07-22 20:51:32,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:32,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184097181] [2022-07-22 20:51:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:32,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:33,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:33,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:33,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:33,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:33,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:51:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:33,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:51:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:33,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:51:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:33,327 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 20:51:33,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:33,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184097181] [2022-07-22 20:51:33,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184097181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:33,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:33,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:51:33,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122653113] [2022-07-22 20:51:33,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:33,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:51:33,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:51:33,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:51:33,376 INFO L87 Difference]: Start difference. First operand has 307 states, 253 states have (on average 1.592885375494071) internal successors, (403), 261 states have internal predecessors, (403), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) 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 20:51:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:34,649 INFO L93 Difference]: Finished difference Result 779 states and 1210 transitions. [2022-07-22 20:51:34,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 20:51:34,652 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 20:51:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:34,665 INFO L225 Difference]: With dead ends: 779 [2022-07-22 20:51:34,665 INFO L226 Difference]: Without dead ends: 482 [2022-07-22 20:51:34,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-22 20:51:34,673 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 859 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:34,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 1956 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:51:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-07-22 20:51:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 412. [2022-07-22 20:51:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 338 states have (on average 1.4881656804733727) internal successors, (503), 346 states have internal predecessors, (503), 49 states have call successors, (49), 22 states have call predecessors, (49), 23 states have return successors, (56), 46 states have call predecessors, (56), 45 states have call successors, (56) [2022-07-22 20:51:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 608 transitions. [2022-07-22 20:51:34,767 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 608 transitions. Word has length 65 [2022-07-22 20:51:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:34,767 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 608 transitions. [2022-07-22 20:51:34,768 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 20:51:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 608 transitions. [2022-07-22 20:51:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:51:34,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:34,772 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 20:51:34,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:51:34,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:34,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1926765203, now seen corresponding path program 1 times [2022-07-22 20:51:34,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:34,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086853732] [2022-07-22 20:51:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:34,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:34,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:34,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:34,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:34,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:51:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:34,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:51:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:34,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:51:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:34,894 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 20:51:34,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086853732] [2022-07-22 20:51:34,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086853732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:34,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:34,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 20:51:34,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119338241] [2022-07-22 20:51:34,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:34,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 20:51:34,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 20:51:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 20:51:34,897 INFO L87 Difference]: Start difference. First operand 412 states and 608 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-22 20:51:36,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:36,705 INFO L93 Difference]: Finished difference Result 1505 states and 2187 transitions. [2022-07-22 20:51:36,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 20:51:36,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2022-07-22 20:51:36,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:36,714 INFO L225 Difference]: With dead ends: 1505 [2022-07-22 20:51:36,714 INFO L226 Difference]: Without dead ends: 1280 [2022-07-22 20:51:36,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 20:51:36,717 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 2468 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2486 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:36,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2486 Valid, 2362 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 20:51:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-07-22 20:51:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1184. [2022-07-22 20:51:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 956 states have (on average 1.4142259414225942) internal successors, (1352), 977 states have internal predecessors, (1352), 132 states have call successors, (132), 82 states have call predecessors, (132), 94 states have return successors, (161), 127 states have call predecessors, (161), 128 states have call successors, (161) [2022-07-22 20:51:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1645 transitions. [2022-07-22 20:51:36,813 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1645 transitions. Word has length 65 [2022-07-22 20:51:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:36,814 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1645 transitions. [2022-07-22 20:51:36,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-22 20:51:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1645 transitions. [2022-07-22 20:51:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:51:36,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:36,817 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 20:51:36,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:51:36,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:36,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1082356585, now seen corresponding path program 1 times [2022-07-22 20:51:36,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:36,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881853731] [2022-07-22 20:51:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:36,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:36,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:36,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:36,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:36,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:36,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:51:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:36,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 20:51:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:51:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:36,937 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 20:51:36,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:36,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881853731] [2022-07-22 20:51:36,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881853731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:36,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:36,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:51:36,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850603538] [2022-07-22 20:51:36,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:36,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:51:36,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:51:36,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:51:36,939 INFO L87 Difference]: Start difference. First operand 1184 states and 1645 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:51:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:37,779 INFO L93 Difference]: Finished difference Result 2284 states and 3169 transitions. [2022-07-22 20:51:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 20:51:37,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-22 20:51:37,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:37,787 INFO L225 Difference]: With dead ends: 2284 [2022-07-22 20:51:37,787 INFO L226 Difference]: Without dead ends: 1294 [2022-07-22 20:51:37,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:51:37,791 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 347 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1948 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:37,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1948 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:51:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-07-22 20:51:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1224. [2022-07-22 20:51:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 988 states have (on average 1.3987854251012146) internal successors, (1382), 1009 states have internal predecessors, (1382), 132 states have call successors, (132), 82 states have call predecessors, (132), 102 states have return successors, (169), 135 states have call predecessors, (169), 128 states have call successors, (169) [2022-07-22 20:51:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1683 transitions. [2022-07-22 20:51:37,853 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1683 transitions. Word has length 66 [2022-07-22 20:51:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:37,854 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1683 transitions. [2022-07-22 20:51:37,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:51:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1683 transitions. [2022-07-22 20:51:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:51:37,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:37,856 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 20:51:37,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:51:37,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2111715883, now seen corresponding path program 1 times [2022-07-22 20:51:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:37,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748903959] [2022-07-22 20:51:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:37,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:37,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:37,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:37,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:37,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:51:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:37,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 20:51:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:37,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:51:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:37,948 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 20:51:37,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:37,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748903959] [2022-07-22 20:51:37,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748903959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:37,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:37,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 20:51:37,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028041425] [2022-07-22 20:51:37,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:37,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 20:51:37,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:37,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 20:51:37,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 20:51:37,951 INFO L87 Difference]: Start difference. First operand 1224 states and 1683 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:51:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:39,603 INFO L93 Difference]: Finished difference Result 3894 states and 5384 transitions. [2022-07-22 20:51:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 20:51:39,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2022-07-22 20:51:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:39,612 INFO L225 Difference]: With dead ends: 3894 [2022-07-22 20:51:39,612 INFO L226 Difference]: Without dead ends: 1614 [2022-07-22 20:51:39,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 20:51:39,628 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 2596 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2614 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:39,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2614 Valid, 2248 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 20:51:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2022-07-22 20:51:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1490. [2022-07-22 20:51:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1178 states have (on average 1.3556876061120544) internal successors, (1597), 1203 states have internal predecessors, (1597), 172 states have call successors, (172), 110 states have call predecessors, (172), 138 states have return successors, (221), 179 states have call predecessors, (221), 168 states have call successors, (221) [2022-07-22 20:51:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1990 transitions. [2022-07-22 20:51:39,702 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 1990 transitions. Word has length 66 [2022-07-22 20:51:39,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:39,703 INFO L495 AbstractCegarLoop]: Abstraction has 1490 states and 1990 transitions. [2022-07-22 20:51:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:51:39,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 1990 transitions. [2022-07-22 20:51:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:39,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:39,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:51:39,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:51:39,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:39,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1744333926, now seen corresponding path program 1 times [2022-07-22 20:51:39,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:39,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797890603] [2022-07-22 20:51:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:39,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:39,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:39,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:39,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:39,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:51:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:39,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:51:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:51:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:51:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:51:39,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:39,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797890603] [2022-07-22 20:51:39,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797890603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:39,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:39,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:51:39,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919152023] [2022-07-22 20:51:39,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:39,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:51:39,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:39,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:51:39,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:51:39,890 INFO L87 Difference]: Start difference. First operand 1490 states and 1990 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:51:40,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:40,670 INFO L93 Difference]: Finished difference Result 2932 states and 3927 transitions. [2022-07-22 20:51:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 20:51:40,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2022-07-22 20:51:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:40,677 INFO L225 Difference]: With dead ends: 2932 [2022-07-22 20:51:40,678 INFO L226 Difference]: Without dead ends: 1636 [2022-07-22 20:51:40,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:51:40,681 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 339 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:40,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1896 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:51:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-07-22 20:51:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1530. [2022-07-22 20:51:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1210 states have (on average 1.3413223140495867) internal successors, (1623), 1235 states have internal predecessors, (1623), 172 states have call successors, (172), 110 states have call predecessors, (172), 146 states have return successors, (229), 187 states have call predecessors, (229), 168 states have call successors, (229) [2022-07-22 20:51:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 2024 transitions. [2022-07-22 20:51:40,772 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 2024 transitions. Word has length 91 [2022-07-22 20:51:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:40,773 INFO L495 AbstractCegarLoop]: Abstraction has 1530 states and 2024 transitions. [2022-07-22 20:51:40,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:51:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 2024 transitions. [2022-07-22 20:51:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:40,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:40,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:51:40,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:51:40,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:40,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2106732696, now seen corresponding path program 1 times [2022-07-22 20:51:40,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:40,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946267162] [2022-07-22 20:51:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:40,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:40,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:40,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:40,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:40,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:51:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:40,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:51:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:40,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:51:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:40,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:51:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:51:40,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:40,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946267162] [2022-07-22 20:51:40,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946267162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:40,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:40,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:51:40,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287457827] [2022-07-22 20:51:40,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:40,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:51:40,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:40,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:51:40,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:51:40,858 INFO L87 Difference]: Start difference. First operand 1530 states and 2024 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:51:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:41,640 INFO L93 Difference]: Finished difference Result 3322 states and 4390 transitions. [2022-07-22 20:51:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:51:41,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-07-22 20:51:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:41,650 INFO L225 Difference]: With dead ends: 3322 [2022-07-22 20:51:41,651 INFO L226 Difference]: Without dead ends: 2060 [2022-07-22 20:51:41,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:51:41,655 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 583 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:41,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 1612 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:51:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-07-22 20:51:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1884. [2022-07-22 20:51:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1492 states have (on average 1.3136729222520107) internal successors, (1960), 1518 states have internal predecessors, (1960), 212 states have call successors, (212), 140 states have call predecessors, (212), 178 states have return successors, (270), 228 states have call predecessors, (270), 208 states have call successors, (270) [2022-07-22 20:51:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2442 transitions. [2022-07-22 20:51:41,777 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2442 transitions. Word has length 91 [2022-07-22 20:51:41,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:41,779 INFO L495 AbstractCegarLoop]: Abstraction has 1884 states and 2442 transitions. [2022-07-22 20:51:41,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:51:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2442 transitions. [2022-07-22 20:51:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:41,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:41,783 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:51:41,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 20:51:41,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2122251414, now seen corresponding path program 1 times [2022-07-22 20:51:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348447526] [2022-07-22 20:51:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:41,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:41,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:41,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:41,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:51:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:51:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:51:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:41,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:51:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:51:41,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348447526] [2022-07-22 20:51:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348447526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:41,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:41,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:51:41,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035547195] [2022-07-22 20:51:41,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:41,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:51:41,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:51:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:51:41,878 INFO L87 Difference]: Start difference. First operand 1884 states and 2442 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:51:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:42,724 INFO L93 Difference]: Finished difference Result 3411 states and 4406 transitions. [2022-07-22 20:51:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 20:51:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-07-22 20:51:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:42,734 INFO L225 Difference]: With dead ends: 3411 [2022-07-22 20:51:42,734 INFO L226 Difference]: Without dead ends: 1958 [2022-07-22 20:51:42,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-22 20:51:42,738 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 1046 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:42,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 1353 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:51:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2022-07-22 20:51:42,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1663. [2022-07-22 20:51:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1324 states have (on average 1.3157099697885197) internal successors, (1742), 1345 states have internal predecessors, (1742), 184 states have call successors, (184), 121 states have call predecessors, (184), 153 states have return successors, (230), 198 states have call predecessors, (230), 180 states have call successors, (230) [2022-07-22 20:51:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2156 transitions. [2022-07-22 20:51:42,809 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2156 transitions. Word has length 91 [2022-07-22 20:51:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:42,809 INFO L495 AbstractCegarLoop]: Abstraction has 1663 states and 2156 transitions. [2022-07-22 20:51:42,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:51:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2156 transitions. [2022-07-22 20:51:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:42,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:42,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:51:42,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 20:51:42,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash -183089368, now seen corresponding path program 1 times [2022-07-22 20:51:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:42,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968034700] [2022-07-22 20:51:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:42,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:42,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:42,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:42,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:51:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:42,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:51:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:42,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:51:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:42,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:51:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 20:51:42,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:42,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968034700] [2022-07-22 20:51:42,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968034700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:42,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:42,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:51:42,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180884118] [2022-07-22 20:51:42,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:42,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:51:42,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:51:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:51:42,885 INFO L87 Difference]: Start difference. First operand 1663 states and 2156 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 20:51:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:43,435 INFO L93 Difference]: Finished difference Result 4815 states and 6268 transitions. [2022-07-22 20:51:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 20:51:43,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2022-07-22 20:51:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:43,453 INFO L225 Difference]: With dead ends: 4815 [2022-07-22 20:51:43,453 INFO L226 Difference]: Without dead ends: 3346 [2022-07-22 20:51:43,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:51:43,459 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 958 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:43,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1092 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 20:51:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2022-07-22 20:51:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 3132. [2022-07-22 20:51:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3132 states, 2473 states have (on average 1.281843914274161) internal successors, (3170), 2523 states have internal predecessors, (3170), 345 states have call successors, (345), 234 states have call predecessors, (345), 312 states have return successors, (513), 377 states have call predecessors, (513), 341 states have call successors, (513) [2022-07-22 20:51:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 4028 transitions. [2022-07-22 20:51:43,602 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 4028 transitions. Word has length 91 [2022-07-22 20:51:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:43,603 INFO L495 AbstractCegarLoop]: Abstraction has 3132 states and 4028 transitions. [2022-07-22 20:51:43,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 20:51:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 4028 transitions. [2022-07-22 20:51:43,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:43,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:43,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:51:43,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 20:51:43,606 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1240927446, now seen corresponding path program 1 times [2022-07-22 20:51:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:43,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821613679] [2022-07-22 20:51:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:43,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:43,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:43,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:43,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:43,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:51:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:43,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:51:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:43,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:51:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:43,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:51:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:51:43,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:43,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821613679] [2022-07-22 20:51:43,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821613679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:43,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:43,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:51:43,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767435300] [2022-07-22 20:51:43,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:43,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:51:43,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:51:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:51:43,671 INFO L87 Difference]: Start difference. First operand 3132 states and 4028 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:51:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:44,081 INFO L93 Difference]: Finished difference Result 4716 states and 6012 transitions. [2022-07-22 20:51:44,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 20:51:44,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-07-22 20:51:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:44,092 INFO L225 Difference]: With dead ends: 4716 [2022-07-22 20:51:44,092 INFO L226 Difference]: Without dead ends: 1778 [2022-07-22 20:51:44,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:51:44,102 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 617 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:44,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 935 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:51:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-07-22 20:51:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1663. [2022-07-22 20:51:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1324 states have (on average 1.2877643504531722) internal successors, (1705), 1345 states have internal predecessors, (1705), 184 states have call successors, (184), 121 states have call predecessors, (184), 153 states have return successors, (230), 198 states have call predecessors, (230), 180 states have call successors, (230) [2022-07-22 20:51:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2119 transitions. [2022-07-22 20:51:44,171 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2119 transitions. Word has length 91 [2022-07-22 20:51:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:44,171 INFO L495 AbstractCegarLoop]: Abstraction has 1663 states and 2119 transitions. [2022-07-22 20:51:44,171 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), 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 20:51:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2119 transitions. [2022-07-22 20:51:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 20:51:44,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:44,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:51:44,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 20:51:44,175 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:44,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2108882217, now seen corresponding path program 1 times [2022-07-22 20:51:44,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:44,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845552217] [2022-07-22 20:51:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:44,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:44,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:44,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:51:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:44,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:51:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:44,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:51:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:44,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:51:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:44,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:51:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:44,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:51:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:44,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 20:51:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:51:44,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:44,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845552217] [2022-07-22 20:51:44,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845552217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:44,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:44,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:51:44,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947141170] [2022-07-22 20:51:44,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:44,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:51:44,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:44,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:51:44,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:51:44,272 INFO L87 Difference]: Start difference. First operand 1663 states and 2119 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 20:51:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:45,424 INFO L93 Difference]: Finished difference Result 4081 states and 5202 transitions. [2022-07-22 20:51:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 20:51:45,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2022-07-22 20:51:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:45,435 INFO L225 Difference]: With dead ends: 4081 [2022-07-22 20:51:45,436 INFO L226 Difference]: Without dead ends: 2461 [2022-07-22 20:51:45,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-07-22 20:51:45,441 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1730 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1767 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:45,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1767 Valid, 1417 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:51:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-07-22 20:51:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2284. [2022-07-22 20:51:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1791 states have (on average 1.254606365159129) internal successors, (2247), 1820 states have internal predecessors, (2247), 261 states have call successors, (261), 169 states have call predecessors, (261), 230 states have return successors, (361), 296 states have call predecessors, (361), 257 states have call successors, (361) [2022-07-22 20:51:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2869 transitions. [2022-07-22 20:51:45,560 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2869 transitions. Word has length 92 [2022-07-22 20:51:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:45,561 INFO L495 AbstractCegarLoop]: Abstraction has 2284 states and 2869 transitions. [2022-07-22 20:51:45,561 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 20:51:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2869 transitions. [2022-07-22 20:51:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:45,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:45,563 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] [2022-07-22 20:51:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:51:45,564 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash -6968229, now seen corresponding path program 1 times [2022-07-22 20:51:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:45,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146401752] [2022-07-22 20:51:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:45,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:45,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:45,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:51:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:45,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:51:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:45,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:51:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:45,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:51:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:45,629 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 20:51:45,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:45,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146401752] [2022-07-22 20:51:45,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146401752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:45,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:45,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:51:45,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186845316] [2022-07-22 20:51:45,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:45,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:51:45,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:45,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:51:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:51:45,631 INFO L87 Difference]: Start difference. First operand 2284 states and 2869 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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 20:51:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:46,206 INFO L93 Difference]: Finished difference Result 2512 states and 3225 transitions. [2022-07-22 20:51:46,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:51:46,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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 91 [2022-07-22 20:51:46,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:46,216 INFO L225 Difference]: With dead ends: 2512 [2022-07-22 20:51:46,217 INFO L226 Difference]: Without dead ends: 2338 [2022-07-22 20:51:46,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:51:46,219 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 550 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:46,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 836 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 20:51:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2022-07-22 20:51:46,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 2284. [2022-07-22 20:51:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1791 states have (on average 1.2540480178671134) internal successors, (2246), 1820 states have internal predecessors, (2246), 261 states have call successors, (261), 169 states have call predecessors, (261), 230 states have return successors, (361), 296 states have call predecessors, (361), 257 states have call successors, (361) [2022-07-22 20:51:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2868 transitions. [2022-07-22 20:51:46,344 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2868 transitions. Word has length 91 [2022-07-22 20:51:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:46,344 INFO L495 AbstractCegarLoop]: Abstraction has 2284 states and 2868 transitions. [2022-07-22 20:51:46,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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 20:51:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2868 transitions. [2022-07-22 20:51:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:46,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:46,346 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] [2022-07-22 20:51:46,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 20:51:46,346 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash -247207975, now seen corresponding path program 1 times [2022-07-22 20:51:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:46,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792164850] [2022-07-22 20:51:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:46,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:46,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:51:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:46,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:51:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:46,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:51:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:46,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:51:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:46,425 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 20:51:46,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:46,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792164850] [2022-07-22 20:51:46,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792164850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:46,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:46,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:51:46,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445237021] [2022-07-22 20:51:46,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:46,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:51:46,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:51:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:51:46,427 INFO L87 Difference]: Start difference. First operand 2284 states and 2868 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 20:51:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:47,517 INFO L93 Difference]: Finished difference Result 2738 states and 3579 transitions. [2022-07-22 20:51:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:51:47,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 91 [2022-07-22 20:51:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:47,528 INFO L225 Difference]: With dead ends: 2738 [2022-07-22 20:51:47,528 INFO L226 Difference]: Without dead ends: 2566 [2022-07-22 20:51:47,529 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 20:51:47,531 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 887 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:47,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1167 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:51:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2022-07-22 20:51:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 2457. [2022-07-22 20:51:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2457 states, 1944 states have (on average 1.2777777777777777) internal successors, (2484), 1974 states have internal predecessors, (2484), 274 states have call successors, (274), 175 states have call predecessors, (274), 237 states have return successors, (377), 309 states have call predecessors, (377), 270 states have call successors, (377) [2022-07-22 20:51:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3135 transitions. [2022-07-22 20:51:47,698 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3135 transitions. Word has length 91 [2022-07-22 20:51:47,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:47,698 INFO L495 AbstractCegarLoop]: Abstraction has 2457 states and 3135 transitions. [2022-07-22 20:51:47,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 20:51:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3135 transitions. [2022-07-22 20:51:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:47,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:47,701 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] [2022-07-22 20:51:47,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 20:51:47,701 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:47,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1993054677, now seen corresponding path program 1 times [2022-07-22 20:51:47,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:47,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511310366] [2022-07-22 20:51:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:47,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:47,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:47,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:51:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:47,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:51:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:47,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:51:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:47,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:51:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:47,792 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 20:51:47,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:47,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511310366] [2022-07-22 20:51:47,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511310366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:47,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:47,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:51:47,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17503670] [2022-07-22 20:51:47,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:47,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:51:47,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:47,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:51:47,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:51:47,795 INFO L87 Difference]: Start difference. First operand 2457 states and 3135 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:49,084 INFO L93 Difference]: Finished difference Result 3141 states and 4201 transitions. [2022-07-22 20:51:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:51:49,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:51:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:49,100 INFO L225 Difference]: With dead ends: 3141 [2022-07-22 20:51:49,100 INFO L226 Difference]: Without dead ends: 2796 [2022-07-22 20:51:49,102 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 20:51:49,103 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 882 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:49,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 1759 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:51:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2796 states. [2022-07-22 20:51:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2796 to 2619. [2022-07-22 20:51:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 2086 states have (on average 1.2943432406519655) internal successors, (2700), 2117 states have internal predecessors, (2700), 287 states have call successors, (287), 181 states have call predecessors, (287), 244 states have return successors, (392), 323 states have call predecessors, (392), 283 states have call successors, (392) [2022-07-22 20:51:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 3379 transitions. [2022-07-22 20:51:49,223 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 3379 transitions. Word has length 91 [2022-07-22 20:51:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:49,224 INFO L495 AbstractCegarLoop]: Abstraction has 2619 states and 3379 transitions. [2022-07-22 20:51:49,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 3379 transitions. [2022-07-22 20:51:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:49,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:49,225 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] [2022-07-22 20:51:49,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:51:49,226 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:49,226 INFO L85 PathProgramCache]: Analyzing trace with hash -567808169, now seen corresponding path program 1 times [2022-07-22 20:51:49,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:49,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889689018] [2022-07-22 20:51:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:49,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:49,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:49,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:51:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:49,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:51:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:49,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:51:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:49,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:51:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:49,320 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 20:51:49,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:49,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889689018] [2022-07-22 20:51:49,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889689018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:49,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:49,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:51:49,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004514970] [2022-07-22 20:51:49,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:49,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:51:49,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:51:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:51:49,323 INFO L87 Difference]: Start difference. First operand 2619 states and 3379 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:50,697 INFO L93 Difference]: Finished difference Result 3734 states and 5113 transitions. [2022-07-22 20:51:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:51:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:51:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:50,712 INFO L225 Difference]: With dead ends: 3734 [2022-07-22 20:51:50,712 INFO L226 Difference]: Without dead ends: 3227 [2022-07-22 20:51:50,716 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 20:51:50,717 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 879 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:50,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 1751 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:51:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2022-07-22 20:51:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2944. [2022-07-22 20:51:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2944 states, 2371 states have (on average 1.321383382539013) internal successors, (3133), 2404 states have internal predecessors, (3133), 313 states have call successors, (313), 193 states have call predecessors, (313), 258 states have return successors, (426), 351 states have call predecessors, (426), 309 states have call successors, (426) [2022-07-22 20:51:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 3872 transitions. [2022-07-22 20:51:50,890 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 3872 transitions. Word has length 91 [2022-07-22 20:51:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:50,890 INFO L495 AbstractCegarLoop]: Abstraction has 2944 states and 3872 transitions. [2022-07-22 20:51:50,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 3872 transitions. [2022-07-22 20:51:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:50,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:50,892 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] [2022-07-22 20:51:50,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:51:50,893 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:50,893 INFO L85 PathProgramCache]: Analyzing trace with hash 319414677, now seen corresponding path program 1 times [2022-07-22 20:51:50,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:50,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283915407] [2022-07-22 20:51:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:50,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:50,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:50,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:51:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:50,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:51:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:51:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:50,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:51:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:50,979 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 20:51:50,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:50,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283915407] [2022-07-22 20:51:50,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283915407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:50,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:50,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:51:50,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175678002] [2022-07-22 20:51:50,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:50,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:51:50,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:50,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:51:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:51:50,981 INFO L87 Difference]: Start difference. First operand 2944 states and 3872 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:52,363 INFO L93 Difference]: Finished difference Result 4879 states and 6870 transitions. [2022-07-22 20:51:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:51:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:51:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:52,384 INFO L225 Difference]: With dead ends: 4879 [2022-07-22 20:51:52,384 INFO L226 Difference]: Without dead ends: 4047 [2022-07-22 20:51:52,390 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 20:51:52,391 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 875 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:52,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1747 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:51:52,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2022-07-22 20:51:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3595. [2022-07-22 20:51:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 2942 states have (on average 1.3592794017675052) internal successors, (3999), 2979 states have internal predecessors, (3999), 365 states have call successors, (365), 217 states have call predecessors, (365), 286 states have return successors, (500), 407 states have call predecessors, (500), 361 states have call successors, (500) [2022-07-22 20:51:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 4864 transitions. [2022-07-22 20:51:52,602 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 4864 transitions. Word has length 91 [2022-07-22 20:51:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:52,602 INFO L495 AbstractCegarLoop]: Abstraction has 3595 states and 4864 transitions. [2022-07-22 20:51:52,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 4864 transitions. [2022-07-22 20:51:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:52,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:52,605 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] [2022-07-22 20:51:52,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:51:52,605 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:52,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1591627881, now seen corresponding path program 1 times [2022-07-22 20:51:52,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:52,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231817783] [2022-07-22 20:51:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:52,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:52,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:52,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:51:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:52,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:51:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:52,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:51:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:51:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:52,682 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 20:51:52,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:52,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231817783] [2022-07-22 20:51:52,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231817783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:52,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:52,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:51:52,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804309420] [2022-07-22 20:51:52,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:52,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:51:52,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:52,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:51:52,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:51:52,686 INFO L87 Difference]: Start difference. First operand 3595 states and 4864 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:54,100 INFO L93 Difference]: Finished difference Result 7168 states and 10400 transitions. [2022-07-22 20:51:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:51:54,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:51:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:54,122 INFO L225 Difference]: With dead ends: 7168 [2022-07-22 20:51:54,122 INFO L226 Difference]: Without dead ends: 5685 [2022-07-22 20:51:54,129 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 20:51:54,130 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 874 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:54,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [897 Valid, 1741 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:51:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2022-07-22 20:51:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 4902. [2022-07-22 20:51:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 4089 states have (on average 1.4030325262900465) internal successors, (5737), 4134 states have internal predecessors, (5737), 469 states have call successors, (469), 265 states have call predecessors, (469), 342 states have return successors, (666), 519 states have call predecessors, (666), 465 states have call successors, (666) [2022-07-22 20:51:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 6872 transitions. [2022-07-22 20:51:54,407 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 6872 transitions. Word has length 91 [2022-07-22 20:51:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:54,407 INFO L495 AbstractCegarLoop]: Abstraction has 4902 states and 6872 transitions. [2022-07-22 20:51:54,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 6872 transitions. [2022-07-22 20:51:54,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:54,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:54,411 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] [2022-07-22 20:51:54,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 20:51:54,411 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1514727083, now seen corresponding path program 1 times [2022-07-22 20:51:54,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:54,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510970987] [2022-07-22 20:51:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:54,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:54,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:54,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:51:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:54,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:51:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:54,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:51:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:54,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:51:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:54,477 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 20:51:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:54,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510970987] [2022-07-22 20:51:54,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510970987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:54,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:54,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:51:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127743536] [2022-07-22 20:51:54,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:54,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:51:54,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:54,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:51:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:51:54,480 INFO L87 Difference]: Start difference. First operand 4902 states and 6872 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:55,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:55,968 INFO L93 Difference]: Finished difference Result 12578 states and 18756 transitions. [2022-07-22 20:51:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:51:55,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:51:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:55,999 INFO L225 Difference]: With dead ends: 12578 [2022-07-22 20:51:55,999 INFO L226 Difference]: Without dead ends: 9788 [2022-07-22 20:51:56,011 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 20:51:56,012 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 1003 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:56,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1719 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:51:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9788 states. [2022-07-22 20:51:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9788 to 7338. [2022-07-22 20:51:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7338 states, 6221 states have (on average 1.4378717248030863) internal successors, (8945), 6282 states have internal predecessors, (8945), 661 states have call successors, (661), 361 states have call predecessors, (661), 454 states have return successors, (1036), 727 states have call predecessors, (1036), 657 states have call successors, (1036) [2022-07-22 20:51:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7338 states to 7338 states and 10642 transitions. [2022-07-22 20:51:56,471 INFO L78 Accepts]: Start accepts. Automaton has 7338 states and 10642 transitions. Word has length 91 [2022-07-22 20:51:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:56,472 INFO L495 AbstractCegarLoop]: Abstraction has 7338 states and 10642 transitions. [2022-07-22 20:51:56,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 7338 states and 10642 transitions. [2022-07-22 20:51:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:56,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:56,477 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] [2022-07-22 20:51:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 20:51:56,477 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash 393730707, now seen corresponding path program 1 times [2022-07-22 20:51:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:56,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919683644] [2022-07-22 20:51:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:56,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:56,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:56,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:51:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:56,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:51:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:56,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:51:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:56,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:51:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:51:56,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:56,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919683644] [2022-07-22 20:51:56,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919683644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:56,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:56,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:51:56,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459582041] [2022-07-22 20:51:56,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:56,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:51:56,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:56,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:51:56,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:51:56,565 INFO L87 Difference]: Start difference. First operand 7338 states and 10642 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:51:58,516 INFO L93 Difference]: Finished difference Result 21544 states and 32728 transitions. [2022-07-22 20:51:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:51:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:51:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:51:58,579 INFO L225 Difference]: With dead ends: 21544 [2022-07-22 20:51:58,579 INFO L226 Difference]: Without dead ends: 16318 [2022-07-22 20:51:58,604 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 20:51:58,605 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 891 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:51:58,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 1762 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:51:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16318 states. [2022-07-22 20:51:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16318 to 12351. [2022-07-22 20:51:59,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12351 states, 10642 states have (on average 1.471433940988536) internal successors, (15659), 10735 states have internal predecessors, (15659), 1029 states have call successors, (1029), 553 states have call predecessors, (1029), 678 states have return successors, (1922), 1127 states have call predecessors, (1922), 1025 states have call successors, (1922) [2022-07-22 20:51:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12351 states to 12351 states and 18610 transitions. [2022-07-22 20:51:59,342 INFO L78 Accepts]: Start accepts. Automaton has 12351 states and 18610 transitions. Word has length 91 [2022-07-22 20:51:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:51:59,342 INFO L495 AbstractCegarLoop]: Abstraction has 12351 states and 18610 transitions. [2022-07-22 20:51:59,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:51:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 12351 states and 18610 transitions. [2022-07-22 20:51:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:51:59,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:51:59,352 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] [2022-07-22 20:51:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 20:51:59,352 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:51:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:51:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash -98895467, now seen corresponding path program 1 times [2022-07-22 20:51:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:51:59,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257332402] [2022-07-22 20:51:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:51:59,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:51:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:59,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:51:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:59,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:51:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:51:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:59,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:51:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:59,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:51:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:51:59,415 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 20:51:59,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:51:59,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257332402] [2022-07-22 20:51:59,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257332402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:51:59,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:51:59,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:51:59,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351081100] [2022-07-22 20:51:59,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:51:59,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:51:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:51:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:51:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:51:59,418 INFO L87 Difference]: Start difference. First operand 12351 states and 18610 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:52:02,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:02,043 INFO L93 Difference]: Finished difference Result 39331 states and 61206 transitions. [2022-07-22 20:52:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:52:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:52:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:02,153 INFO L225 Difference]: With dead ends: 39331 [2022-07-22 20:52:02,153 INFO L226 Difference]: Without dead ends: 29092 [2022-07-22 20:52:02,197 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 20:52:02,197 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 924 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:02,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [952 Valid, 1713 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:52:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29092 states. [2022-07-22 20:52:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29092 to 22344. [2022-07-22 20:52:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22344 states, 19483 states have (on average 1.494482369244983) internal successors, (29117), 19640 states have internal predecessors, (29117), 1733 states have call successors, (1733), 937 states have call predecessors, (1733), 1126 states have return successors, (4148), 1895 states have call predecessors, (4148), 1729 states have call successors, (4148) [2022-07-22 20:52:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22344 states to 22344 states and 34998 transitions. [2022-07-22 20:52:03,584 INFO L78 Accepts]: Start accepts. Automaton has 22344 states and 34998 transitions. Word has length 91 [2022-07-22 20:52:03,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:03,585 INFO L495 AbstractCegarLoop]: Abstraction has 22344 states and 34998 transitions. [2022-07-22 20:52:03,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:52:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 22344 states and 34998 transitions. [2022-07-22 20:52:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:52:03,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:03,603 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] [2022-07-22 20:52:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 20:52:03,603 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash 855044691, now seen corresponding path program 1 times [2022-07-22 20:52:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:03,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101723986] [2022-07-22 20:52:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:03,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:03,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:03,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:52:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:03,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:52:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:52:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:03,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:52:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:03,667 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 20:52:03,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:03,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101723986] [2022-07-22 20:52:03,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101723986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:03,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:03,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:03,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388907286] [2022-07-22 20:52:03,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:03,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:03,669 INFO L87 Difference]: Start difference. First operand 22344 states and 34998 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:52:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:07,505 INFO L93 Difference]: Finished difference Result 73722 states and 118220 transitions. [2022-07-22 20:52:07,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:52:07,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:52:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:07,745 INFO L225 Difference]: With dead ends: 73722 [2022-07-22 20:52:07,745 INFO L226 Difference]: Without dead ends: 53490 [2022-07-22 20:52:07,811 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 20:52:07,811 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 884 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:07,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 1709 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:52:07,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53490 states. [2022-07-22 20:52:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53490 to 42265. [2022-07-22 20:52:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42265 states, 37164 states have (on average 1.5093908083091163) internal successors, (56095), 37449 states have internal predecessors, (56095), 3077 states have call successors, (3077), 1705 states have call predecessors, (3077), 2022 states have return successors, (9994), 3367 states have call predecessors, (9994), 3073 states have call successors, (9994) [2022-07-22 20:52:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42265 states to 42265 states and 69166 transitions. [2022-07-22 20:52:10,361 INFO L78 Accepts]: Start accepts. Automaton has 42265 states and 69166 transitions. Word has length 91 [2022-07-22 20:52:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:10,361 INFO L495 AbstractCegarLoop]: Abstraction has 42265 states and 69166 transitions. [2022-07-22 20:52:10,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:52:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 42265 states and 69166 transitions. [2022-07-22 20:52:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:52:10,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:10,392 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] [2022-07-22 20:52:10,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 20:52:10,393 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:10,393 INFO L85 PathProgramCache]: Analyzing trace with hash -361109035, now seen corresponding path program 1 times [2022-07-22 20:52:10,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:10,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144046723] [2022-07-22 20:52:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:10,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:10,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:10,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:52:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:10,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:52:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:10,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:52:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:10,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:52:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:10,512 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 20:52:10,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:10,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144046723] [2022-07-22 20:52:10,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144046723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:10,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:10,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:10,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133283933] [2022-07-22 20:52:10,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:10,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:10,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:10,515 INFO L87 Difference]: Start difference. First operand 42265 states and 69166 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:52:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:16,770 INFO L93 Difference]: Finished difference Result 111749 states and 179235 transitions. [2022-07-22 20:52:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 20:52:16,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:52:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:17,088 INFO L225 Difference]: With dead ends: 111749 [2022-07-22 20:52:17,088 INFO L226 Difference]: Without dead ends: 71597 [2022-07-22 20:52:17,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-22 20:52:17,193 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 566 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:17,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1409 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:52:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71597 states. [2022-07-22 20:52:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71597 to 43036. [2022-07-22 20:52:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43036 states, 37935 states have (on average 1.4990378278634506) internal successors, (56866), 38220 states have internal predecessors, (56866), 3077 states have call successors, (3077), 1705 states have call predecessors, (3077), 2022 states have return successors, (9994), 3367 states have call predecessors, (9994), 3073 states have call successors, (9994) [2022-07-22 20:52:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43036 states to 43036 states and 69937 transitions. [2022-07-22 20:52:20,133 INFO L78 Accepts]: Start accepts. Automaton has 43036 states and 69937 transitions. Word has length 91 [2022-07-22 20:52:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:20,134 INFO L495 AbstractCegarLoop]: Abstraction has 43036 states and 69937 transitions. [2022-07-22 20:52:20,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:52:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 43036 states and 69937 transitions. [2022-07-22 20:52:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:52:20,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:20,172 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] [2022-07-22 20:52:20,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 20:52:20,172 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 72620051, now seen corresponding path program 1 times [2022-07-22 20:52:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:20,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95746575] [2022-07-22 20:52:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:20,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:20,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:52:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:52:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:20,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:52:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:20,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:52:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:20,297 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 20:52:20,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95746575] [2022-07-22 20:52:20,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95746575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:20,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:20,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:20,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461480819] [2022-07-22 20:52:20,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:20,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:20,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:20,299 INFO L87 Difference]: Start difference. First operand 43036 states and 69937 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:52:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:30,600 INFO L93 Difference]: Finished difference Result 183726 states and 302063 transitions. [2022-07-22 20:52:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 20:52:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-22 20:52:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:31,445 INFO L225 Difference]: With dead ends: 183726 [2022-07-22 20:52:31,445 INFO L226 Difference]: Without dead ends: 142803 [2022-07-22 20:52:31,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:52:31,574 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 2047 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:31,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2077 Valid, 1539 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 20:52:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142803 states. [2022-07-22 20:52:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142803 to 118634. [2022-07-22 20:52:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118634 states, 104323 states have (on average 1.4932373493860414) internal successors, (155779), 105507 states have internal predecessors, (155779), 8685 states have call successors, (8685), 4795 states have call predecessors, (8685), 5624 states have return successors, (28611), 8588 states have call predecessors, (28611), 8681 states have call successors, (28611) [2022-07-22 20:52:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118634 states to 118634 states and 193075 transitions. [2022-07-22 20:52:39,182 INFO L78 Accepts]: Start accepts. Automaton has 118634 states and 193075 transitions. Word has length 91 [2022-07-22 20:52:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:39,183 INFO L495 AbstractCegarLoop]: Abstraction has 118634 states and 193075 transitions. [2022-07-22 20:52:39,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 20:52:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 118634 states and 193075 transitions. [2022-07-22 20:52:39,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 20:52:39,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:39,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:39,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 20:52:39,409 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:39,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1917455745, now seen corresponding path program 1 times [2022-07-22 20:52:39,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:39,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972237119] [2022-07-22 20:52:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:39,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 20:52:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:52:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 20:52:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:52:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-22 20:52:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:52:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:52:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 20:52:39,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:39,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972237119] [2022-07-22 20:52:39,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972237119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:52:39,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476994355] [2022-07-22 20:52:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:39,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:52:39,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:52:39,501 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 20:52:39,503 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 20:52:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:52:39,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:52:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 20:52:39,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:52:39,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476994355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:39,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:52:39,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-22 20:52:39,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751663661] [2022-07-22 20:52:39,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:52:39,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:52:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:52:39,950 INFO L87 Difference]: Start difference. First operand 118634 states and 193075 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)