./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 6c24879c 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-?-6c24879 [2022-07-12 09:35:15,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:35:15,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:35:15,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:35:15,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:35:15,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:35:15,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:35:15,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:35:15,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:35:15,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:35:15,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:35:15,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:35:15,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:35:15,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:35:15,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:35:15,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:35:15,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:35:15,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:35:15,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:35:15,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:35:15,825 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:35:15,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:35:15,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:35:15,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:35:15,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:35:15,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:35:15,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:35:15,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:35:15,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:35:15,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:35:15,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:35:15,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:35:15,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:35:15,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:35:15,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:35:15,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:35:15,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:35:15,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:35:15,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:35:15,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:35:15,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:35:15,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:35:15,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 09:35:15,859 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:35:15,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:35:15,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:35:15,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:35:15,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:35:15,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:35:15,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:35:15,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:35:15,862 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:35:15,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:35:15,862 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:35:15,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 09:35:15,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:35:15,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:35:15,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:35:15,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:35:15,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:35:15,864 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:35:15,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:35:15,864 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:35:15,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:35:15,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:35:15,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:35:15,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:35:15,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:35:15,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:35:15,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:35:15,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:35:15,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 09:35:15,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 09:35:15,866 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:35:15,867 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:35:15,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:35:15,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd466f23ab481babcc03c4173983e1af9100c535496f2e2f8c8fc18a8aaf4174 [2022-07-12 09:35:16,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:35:16,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:35:16,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:35:16,106 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:35:16,107 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:35:16,108 INFO L432 ainManager$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 [2022-07-12 09:35:16,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d0830f97/22deef8b58c3496697ffac8ae4c8f1c0/FLAG46680142e [2022-07-12 09:35:16,602 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:35:16,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.04.cil-2.c [2022-07-12 09:35:16,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d0830f97/22deef8b58c3496697ffac8ae4c8f1c0/FLAG46680142e [2022-07-12 09:35:16,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d0830f97/22deef8b58c3496697ffac8ae4c8f1c0 [2022-07-12 09:35:16,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:35:16,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:35:16,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:35:16,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:35:16,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:35:16,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:35:16" (1/1) ... [2022-07-12 09:35:16,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d65fb22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:16, skipping insertion in model container [2022-07-12 09:35:16,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:35:16" (1/1) ... [2022-07-12 09:35:17,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:35:17,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:35:17,182 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] [2022-07-12 09:35:17,237 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] [2022-07-12 09:35:17,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:35:17,286 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:35:17,297 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] [2022-07-12 09:35:17,315 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] [2022-07-12 09:35:17,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:35:17,364 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:35:17,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17 WrapperNode [2022-07-12 09:35:17,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:35:17,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:35:17,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:35:17,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:35:17,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,451 INFO L137 Inliner]: procedures = 63, calls = 74, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 619 [2022-07-12 09:35:17,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:35:17,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:35:17,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:35:17,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:35:17,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:35:17,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:35:17,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:35:17,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:35:17,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (1/1) ... [2022-07-12 09:35:17,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:35:17,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:35:17,544 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) [2022-07-12 09:35:17,564 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 [2022-07-12 09:35:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:35:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-12 09:35:17,589 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-12 09:35:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-07-12 09:35:17,590 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-07-12 09:35:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-12 09:35:17,590 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-12 09:35:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-12 09:35:17,590 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-12 09:35:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-07-12 09:35:17,591 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-07-12 09:35:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-12 09:35:17,591 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-12 09:35:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-12 09:35:17,591 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-12 09:35:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-07-12 09:35:17,592 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-07-12 09:35:17,592 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-07-12 09:35:17,592 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-07-12 09:35:17,593 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-07-12 09:35:17,593 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-07-12 09:35:17,593 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-12 09:35:17,594 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-12 09:35:17,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 09:35:17,594 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-12 09:35:17,594 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-12 09:35:17,594 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-07-12 09:35:17,594 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-07-12 09:35:17,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:35:17,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:35:17,594 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-12 09:35:17,594 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-12 09:35:17,594 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-12 09:35:17,594 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-12 09:35:17,676 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:35:17,678 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:35:18,188 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-07-12 09:35:18,189 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; [2022-07-12 09:35:18,238 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:35:18,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:35:18,254 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-12 09:35:18,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:35:18 BoogieIcfgContainer [2022-07-12 09:35:18,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:35:18,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:35:18,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:35:18,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:35:18,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:35:16" (1/3) ... [2022-07-12 09:35:18,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54431744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:35:18, skipping insertion in model container [2022-07-12 09:35:18,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:35:17" (2/3) ... [2022-07-12 09:35:18,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54431744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:35:18, skipping insertion in model container [2022-07-12 09:35:18,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:35:18" (3/3) ... [2022-07-12 09:35:18,269 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.04.cil-2.c [2022-07-12 09:35:18,281 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:35:18,282 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 09:35:18,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:35:18,346 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@531b6d3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@178329c7 [2022-07-12 09:35:18,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 09:35:18,350 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) [2022-07-12 09:35:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 09:35:18,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:18,364 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] [2022-07-12 09:35:18,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash 101820907, now seen corresponding path program 1 times [2022-07-12 09:35:18,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:18,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621684513] [2022-07-12 09:35:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:18,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:18,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:18,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:18,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 09:35:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:18,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 09:35:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:18,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 09:35:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:18,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:18,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621684513] [2022-07-12 09:35:18,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621684513] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:18,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:18,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 09:35:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414031682] [2022-07-12 09:35:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 09:35:18,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 09:35:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:35:18,823 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) [2022-07-12 09:35:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:19,990 INFO L93 Difference]: Finished difference Result 779 states and 1210 transitions. [2022-07-12 09:35:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 09:35:19,992 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 [2022-07-12 09:35:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:20,016 INFO L225 Difference]: With dead ends: 779 [2022-07-12 09:35:20,017 INFO L226 Difference]: Without dead ends: 482 [2022-07-12 09:35:20,025 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 [2022-07-12 09:35:20,028 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 859 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 09:35:20,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1956 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 09:35:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-07-12 09:35:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 412. [2022-07-12 09:35:20,117 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) [2022-07-12 09:35:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 608 transitions. [2022-07-12 09:35:20,122 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 608 transitions. Word has length 65 [2022-07-12 09:35:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:20,123 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 608 transitions. [2022-07-12 09:35:20,124 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) [2022-07-12 09:35:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 608 transitions. [2022-07-12 09:35:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 09:35:20,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:20,138 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] [2022-07-12 09:35:20,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 09:35:20,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:20,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1926765203, now seen corresponding path program 1 times [2022-07-12 09:35:20,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:20,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88014279] [2022-07-12 09:35:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:20,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:20,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:20,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:20,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:20,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:20,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 09:35:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:20,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 09:35:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:20,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 09:35:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:20,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:20,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88014279] [2022-07-12 09:35:20,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88014279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:20,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:20,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 09:35:20,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449329425] [2022-07-12 09:35:20,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:20,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 09:35:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 09:35:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-12 09:35:20,329 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) [2022-07-12 09:35:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:22,114 INFO L93 Difference]: Finished difference Result 1505 states and 2187 transitions. [2022-07-12 09:35:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 09:35:22,115 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 [2022-07-12 09:35:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:22,122 INFO L225 Difference]: With dead ends: 1505 [2022-07-12 09:35:22,122 INFO L226 Difference]: Without dead ends: 1280 [2022-07-12 09:35:22,124 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 [2022-07-12 09:35:22,125 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 2468 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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 [2022-07-12 09:35:22,126 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] [2022-07-12 09:35:22,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-07-12 09:35:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1184. [2022-07-12 09:35:22,211 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) [2022-07-12 09:35:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1645 transitions. [2022-07-12 09:35:22,222 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1645 transitions. Word has length 65 [2022-07-12 09:35:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:22,222 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1645 transitions. [2022-07-12 09:35:22,222 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) [2022-07-12 09:35:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1645 transitions. [2022-07-12 09:35:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 09:35:22,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:22,225 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] [2022-07-12 09:35:22,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 09:35:22,226 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1082356585, now seen corresponding path program 1 times [2022-07-12 09:35:22,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:22,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329814733] [2022-07-12 09:35:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:22,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:22,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:22,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:22,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:22,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:22,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 09:35:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:22,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-12 09:35:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:22,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-12 09:35:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:22,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:22,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329814733] [2022-07-12 09:35:22,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329814733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:22,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:22,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 09:35:22,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381433924] [2022-07-12 09:35:22,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 09:35:22,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:22,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 09:35:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:35:22,419 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) [2022-07-12 09:35:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:23,210 INFO L93 Difference]: Finished difference Result 2284 states and 3169 transitions. [2022-07-12 09:35:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 09:35:23,211 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 [2022-07-12 09:35:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:23,217 INFO L225 Difference]: With dead ends: 2284 [2022-07-12 09:35:23,217 INFO L226 Difference]: Without dead ends: 1294 [2022-07-12 09:35:23,219 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 [2022-07-12 09:35:23,220 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 347 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 09:35:23,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1949 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 09:35:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-07-12 09:35:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1224. [2022-07-12 09:35:23,284 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) [2022-07-12 09:35:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1683 transitions. [2022-07-12 09:35:23,290 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1683 transitions. Word has length 66 [2022-07-12 09:35:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:23,290 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1683 transitions. [2022-07-12 09:35:23,291 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) [2022-07-12 09:35:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1683 transitions. [2022-07-12 09:35:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 09:35:23,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:23,292 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] [2022-07-12 09:35:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 09:35:23,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2111715883, now seen corresponding path program 1 times [2022-07-12 09:35:23,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:23,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571398580] [2022-07-12 09:35:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:23,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:23,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:23,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:23,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:23,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:23,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 09:35:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:23,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-12 09:35:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:23,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-12 09:35:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:23,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:23,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571398580] [2022-07-12 09:35:23,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571398580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:23,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:23,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 09:35:23,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691126862] [2022-07-12 09:35:23,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:23,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 09:35:23,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 09:35:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-12 09:35:23,381 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) [2022-07-12 09:35:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:25,091 INFO L93 Difference]: Finished difference Result 3894 states and 5384 transitions. [2022-07-12 09:35:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 09:35:25,092 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 [2022-07-12 09:35:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:25,100 INFO L225 Difference]: With dead ends: 3894 [2022-07-12 09:35:25,100 INFO L226 Difference]: Without dead ends: 1614 [2022-07-12 09:35:25,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 09:35:25,112 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 2596 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 [2022-07-12 09:35:25,113 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] [2022-07-12 09:35:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2022-07-12 09:35:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1490. [2022-07-12 09:35:25,182 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) [2022-07-12 09:35:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1990 transitions. [2022-07-12 09:35:25,190 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 1990 transitions. Word has length 66 [2022-07-12 09:35:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:25,190 INFO L495 AbstractCegarLoop]: Abstraction has 1490 states and 1990 transitions. [2022-07-12 09:35:25,191 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) [2022-07-12 09:35:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 1990 transitions. [2022-07-12 09:35:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:25,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:25,193 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] [2022-07-12 09:35:25,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 09:35:25,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1744333926, now seen corresponding path program 1 times [2022-07-12 09:35:25,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:25,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275963267] [2022-07-12 09:35:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:25,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:25,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:25,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:25,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:25,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 09:35:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:25,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-12 09:35:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:25,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-12 09:35:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:25,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-12 09:35:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 09:35:25,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:25,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275963267] [2022-07-12 09:35:25,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275963267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:25,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:25,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 09:35:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31221758] [2022-07-12 09:35:25,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:25,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 09:35:25,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 09:35:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:35:25,339 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) [2022-07-12 09:35:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:26,107 INFO L93 Difference]: Finished difference Result 2932 states and 3927 transitions. [2022-07-12 09:35:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 09:35:26,108 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 [2022-07-12 09:35:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:26,117 INFO L225 Difference]: With dead ends: 2932 [2022-07-12 09:35:26,118 INFO L226 Difference]: Without dead ends: 1636 [2022-07-12 09:35:26,122 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 [2022-07-12 09:35:26,122 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 [2022-07-12 09:35:26,123 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] [2022-07-12 09:35:26,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-07-12 09:35:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1530. [2022-07-12 09:35:26,184 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) [2022-07-12 09:35:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 2024 transitions. [2022-07-12 09:35:26,192 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 2024 transitions. Word has length 91 [2022-07-12 09:35:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:26,193 INFO L495 AbstractCegarLoop]: Abstraction has 1530 states and 2024 transitions. [2022-07-12 09:35:26,193 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) [2022-07-12 09:35:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 2024 transitions. [2022-07-12 09:35:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:26,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:26,198 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] [2022-07-12 09:35:26,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 09:35:26,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:26,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2106732696, now seen corresponding path program 1 times [2022-07-12 09:35:26,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:26,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559862000] [2022-07-12 09:35:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:26,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:26,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:26,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:26,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:26,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:26,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 09:35:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:26,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-12 09:35:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:26,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-12 09:35:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:26,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-12 09:35:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 09:35:26,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:26,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559862000] [2022-07-12 09:35:26,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559862000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:26,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:26,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 09:35:26,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111062041] [2022-07-12 09:35:26,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:26,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 09:35:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 09:35:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:35:26,297 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) [2022-07-12 09:35:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:27,098 INFO L93 Difference]: Finished difference Result 3322 states and 4390 transitions. [2022-07-12 09:35:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 09:35:27,098 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 [2022-07-12 09:35:27,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:27,109 INFO L225 Difference]: With dead ends: 3322 [2022-07-12 09:35:27,109 INFO L226 Difference]: Without dead ends: 2060 [2022-07-12 09:35:27,113 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 [2022-07-12 09:35:27,114 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 [2022-07-12 09:35:27,115 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] [2022-07-12 09:35:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-07-12 09:35:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1884. [2022-07-12 09:35:27,214 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) [2022-07-12 09:35:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2442 transitions. [2022-07-12 09:35:27,222 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2442 transitions. Word has length 91 [2022-07-12 09:35:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:27,222 INFO L495 AbstractCegarLoop]: Abstraction has 1884 states and 2442 transitions. [2022-07-12 09:35:27,222 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) [2022-07-12 09:35:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2442 transitions. [2022-07-12 09:35:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:27,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:27,227 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] [2022-07-12 09:35:27,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 09:35:27,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:27,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2122251414, now seen corresponding path program 1 times [2022-07-12 09:35:27,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:27,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371060305] [2022-07-12 09:35:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:27,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:27,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:27,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:27,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:27,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 09:35:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:27,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-12 09:35:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:27,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-12 09:35:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:27,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-12 09:35:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 09:35:27,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:27,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371060305] [2022-07-12 09:35:27,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371060305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:27,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:27,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 09:35:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143090214] [2022-07-12 09:35:27,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:27,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 09:35:27,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 09:35:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:35:27,341 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) [2022-07-12 09:35:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:28,135 INFO L93 Difference]: Finished difference Result 3411 states and 4406 transitions. [2022-07-12 09:35:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 09:35:28,136 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 [2022-07-12 09:35:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:28,146 INFO L225 Difference]: With dead ends: 3411 [2022-07-12 09:35:28,146 INFO L226 Difference]: Without dead ends: 1958 [2022-07-12 09:35:28,149 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 [2022-07-12 09:35:28,150 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 [2022-07-12 09:35:28,151 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] [2022-07-12 09:35:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2022-07-12 09:35:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1663. [2022-07-12 09:35:28,219 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) [2022-07-12 09:35:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2156 transitions. [2022-07-12 09:35:28,224 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2156 transitions. Word has length 91 [2022-07-12 09:35:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:28,224 INFO L495 AbstractCegarLoop]: Abstraction has 1663 states and 2156 transitions. [2022-07-12 09:35:28,224 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) [2022-07-12 09:35:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2156 transitions. [2022-07-12 09:35:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:28,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:28,226 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] [2022-07-12 09:35:28,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 09:35:28,229 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:28,230 INFO L85 PathProgramCache]: Analyzing trace with hash -183089368, now seen corresponding path program 1 times [2022-07-12 09:35:28,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:28,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183667458] [2022-07-12 09:35:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:28,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:28,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:28,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:28,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:28,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:28,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 09:35:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:28,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-12 09:35:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:28,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-12 09:35:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:28,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-12 09:35:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:35:28,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:28,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183667458] [2022-07-12 09:35:28,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183667458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:28,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:28,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:28,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100879169] [2022-07-12 09:35:28,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:28,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:28,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:28,325 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) [2022-07-12 09:35:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:28,832 INFO L93 Difference]: Finished difference Result 4815 states and 6268 transitions. [2022-07-12 09:35:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 09:35:28,832 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 [2022-07-12 09:35:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:28,849 INFO L225 Difference]: With dead ends: 4815 [2022-07-12 09:35:28,849 INFO L226 Difference]: Without dead ends: 3346 [2022-07-12 09:35:28,853 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 [2022-07-12 09:35:28,853 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 958 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 09:35:28,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1092 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 09:35:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2022-07-12 09:35:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 3132. [2022-07-12 09:35:28,980 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) [2022-07-12 09:35:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 4028 transitions. [2022-07-12 09:35:28,992 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 4028 transitions. Word has length 91 [2022-07-12 09:35:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:28,992 INFO L495 AbstractCegarLoop]: Abstraction has 3132 states and 4028 transitions. [2022-07-12 09:35:28,993 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) [2022-07-12 09:35:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 4028 transitions. [2022-07-12 09:35:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:28,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:28,997 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] [2022-07-12 09:35:28,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 09:35:28,997 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:28,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1240927446, now seen corresponding path program 1 times [2022-07-12 09:35:28,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:28,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250448118] [2022-07-12 09:35:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:28,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 09:35:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-12 09:35:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-12 09:35:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-12 09:35:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 09:35:29,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:29,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250448118] [2022-07-12 09:35:29,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250448118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:29,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:29,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:35:29,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578195270] [2022-07-12 09:35:29,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:29,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:35:29,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:29,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:35:29,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:35:29,056 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) [2022-07-12 09:35:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:29,411 INFO L93 Difference]: Finished difference Result 4716 states and 6012 transitions. [2022-07-12 09:35:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 09:35:29,412 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 [2022-07-12 09:35:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:29,426 INFO L225 Difference]: With dead ends: 4716 [2022-07-12 09:35:29,427 INFO L226 Difference]: Without dead ends: 1778 [2022-07-12 09:35:29,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-12 09:35:29,437 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 [2022-07-12 09:35:29,437 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] [2022-07-12 09:35:29,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-07-12 09:35:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1663. [2022-07-12 09:35:29,502 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) [2022-07-12 09:35:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2119 transitions. [2022-07-12 09:35:29,507 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2119 transitions. Word has length 91 [2022-07-12 09:35:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:29,507 INFO L495 AbstractCegarLoop]: Abstraction has 1663 states and 2119 transitions. [2022-07-12 09:35:29,508 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) [2022-07-12 09:35:29,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2119 transitions. [2022-07-12 09:35:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 09:35:29,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:29,509 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] [2022-07-12 09:35:29,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 09:35:29,509 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:29,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2108882217, now seen corresponding path program 1 times [2022-07-12 09:35:29,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:29,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505969324] [2022-07-12 09:35:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 09:35:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 09:35:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 09:35:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 09:35:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-12 09:35:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-12 09:35:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-12 09:35:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:35:29,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:29,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505969324] [2022-07-12 09:35:29,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505969324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:29,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:29,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 09:35:29,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90592343] [2022-07-12 09:35:29,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:29,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 09:35:29,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 09:35:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:35:29,607 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) [2022-07-12 09:35:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:30,729 INFO L93 Difference]: Finished difference Result 4081 states and 5202 transitions. [2022-07-12 09:35:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 09:35:30,730 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 [2022-07-12 09:35:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:30,740 INFO L225 Difference]: With dead ends: 4081 [2022-07-12 09:35:30,740 INFO L226 Difference]: Without dead ends: 2461 [2022-07-12 09:35:30,745 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 [2022-07-12 09:35:30,745 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 1730 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1767 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 09:35:30,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1767 Valid, 1419 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 09:35:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-07-12 09:35:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2284. [2022-07-12 09:35:30,855 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) [2022-07-12 09:35:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2869 transitions. [2022-07-12 09:35:30,860 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2869 transitions. Word has length 92 [2022-07-12 09:35:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:30,861 INFO L495 AbstractCegarLoop]: Abstraction has 2284 states and 2869 transitions. [2022-07-12 09:35:30,861 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) [2022-07-12 09:35:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2869 transitions. [2022-07-12 09:35:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:30,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:30,863 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] [2022-07-12 09:35:30,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 09:35:30,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:30,864 INFO L85 PathProgramCache]: Analyzing trace with hash -6968229, now seen corresponding path program 1 times [2022-07-12 09:35:30,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:30,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008577735] [2022-07-12 09:35:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:30,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:30,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:30,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:30,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:30,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:30,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:30,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:30,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008577735] [2022-07-12 09:35:30,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008577735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:30,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:30,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:35:30,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120871678] [2022-07-12 09:35:30,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:30,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 09:35:30,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:30,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 09:35:30,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:35:30,920 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) [2022-07-12 09:35:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:31,524 INFO L93 Difference]: Finished difference Result 2512 states and 3225 transitions. [2022-07-12 09:35:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 09:35:31,526 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 [2022-07-12 09:35:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:31,535 INFO L225 Difference]: With dead ends: 2512 [2022-07-12 09:35:31,535 INFO L226 Difference]: Without dead ends: 2338 [2022-07-12 09:35:31,536 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 [2022-07-12 09:35:31,536 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 550 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-07-12 09:35:31,537 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] [2022-07-12 09:35:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2022-07-12 09:35:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 2284. [2022-07-12 09:35:31,642 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) [2022-07-12 09:35:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2868 transitions. [2022-07-12 09:35:31,648 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2868 transitions. Word has length 91 [2022-07-12 09:35:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:31,648 INFO L495 AbstractCegarLoop]: Abstraction has 2284 states and 2868 transitions. [2022-07-12 09:35:31,648 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) [2022-07-12 09:35:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2868 transitions. [2022-07-12 09:35:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:31,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:31,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:35:31,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 09:35:31,650 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash -247207975, now seen corresponding path program 1 times [2022-07-12 09:35:31,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:31,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971316142] [2022-07-12 09:35:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:31,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:31,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:31,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:31,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:31,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:31,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:31,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:31,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971316142] [2022-07-12 09:35:31,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971316142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:31,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:31,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:35:31,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885936852] [2022-07-12 09:35:31,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:31,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:35:31,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:31,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:35:31,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:35:31,722 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) [2022-07-12 09:35:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:32,667 INFO L93 Difference]: Finished difference Result 2738 states and 3579 transitions. [2022-07-12 09:35:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 09:35:32,667 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 [2022-07-12 09:35:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:32,678 INFO L225 Difference]: With dead ends: 2738 [2022-07-12 09:35:32,678 INFO L226 Difference]: Without dead ends: 2566 [2022-07-12 09:35:32,680 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 [2022-07-12 09:35:32,680 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 887 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 09:35:32,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1167 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 09:35:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2022-07-12 09:35:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 2457. [2022-07-12 09:35:32,818 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) [2022-07-12 09:35:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3135 transitions. [2022-07-12 09:35:32,825 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3135 transitions. Word has length 91 [2022-07-12 09:35:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:32,825 INFO L495 AbstractCegarLoop]: Abstraction has 2457 states and 3135 transitions. [2022-07-12 09:35:32,826 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) [2022-07-12 09:35:32,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3135 transitions. [2022-07-12 09:35:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:32,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:32,827 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] [2022-07-12 09:35:32,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 09:35:32,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:32,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1993054677, now seen corresponding path program 1 times [2022-07-12 09:35:32,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:32,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195469977] [2022-07-12 09:35:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:32,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:32,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:32,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:32,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:32,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:32,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:32,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:32,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195469977] [2022-07-12 09:35:32,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195469977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:32,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:32,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:32,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314828133] [2022-07-12 09:35:32,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:32,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:32,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:32,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:32,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:32,905 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) [2022-07-12 09:35:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:34,219 INFO L93 Difference]: Finished difference Result 3141 states and 4201 transitions. [2022-07-12 09:35:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 09:35:34,219 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 [2022-07-12 09:35:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:34,229 INFO L225 Difference]: With dead ends: 3141 [2022-07-12 09:35:34,229 INFO L226 Difference]: Without dead ends: 2796 [2022-07-12 09:35:34,231 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 [2022-07-12 09:35:34,231 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 882 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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 [2022-07-12 09:35:34,231 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] [2022-07-12 09:35:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2796 states. [2022-07-12 09:35:34,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2796 to 2619. [2022-07-12 09:35:34,349 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) [2022-07-12 09:35:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 3379 transitions. [2022-07-12 09:35:34,355 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 3379 transitions. Word has length 91 [2022-07-12 09:35:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:34,356 INFO L495 AbstractCegarLoop]: Abstraction has 2619 states and 3379 transitions. [2022-07-12 09:35:34,356 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) [2022-07-12 09:35:34,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 3379 transitions. [2022-07-12 09:35:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:34,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:34,357 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] [2022-07-12 09:35:34,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 09:35:34,358 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash -567808169, now seen corresponding path program 1 times [2022-07-12 09:35:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:34,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821679598] [2022-07-12 09:35:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:34,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:34,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:34,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:34,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:34,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:34,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:34,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821679598] [2022-07-12 09:35:34,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821679598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:34,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:34,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:34,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766192681] [2022-07-12 09:35:34,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:34,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:34,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:34,457 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) [2022-07-12 09:35:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:35,753 INFO L93 Difference]: Finished difference Result 3734 states and 5113 transitions. [2022-07-12 09:35:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 09:35:35,754 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 [2022-07-12 09:35:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:35,767 INFO L225 Difference]: With dead ends: 3734 [2022-07-12 09:35:35,767 INFO L226 Difference]: Without dead ends: 3227 [2022-07-12 09:35:35,770 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 [2022-07-12 09:35:35,771 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 879 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:35:35,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 1751 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 09:35:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2022-07-12 09:35:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2944. [2022-07-12 09:35:35,933 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) [2022-07-12 09:35:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 3872 transitions. [2022-07-12 09:35:35,939 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 3872 transitions. Word has length 91 [2022-07-12 09:35:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:35,940 INFO L495 AbstractCegarLoop]: Abstraction has 2944 states and 3872 transitions. [2022-07-12 09:35:35,940 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) [2022-07-12 09:35:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 3872 transitions. [2022-07-12 09:35:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:35,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:35,942 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] [2022-07-12 09:35:35,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 09:35:35,942 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash 319414677, now seen corresponding path program 1 times [2022-07-12 09:35:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:35,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263164930] [2022-07-12 09:35:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:35,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:35,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:35,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:36,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:36,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:36,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:36,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:36,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263164930] [2022-07-12 09:35:36,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263164930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:36,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:36,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375192710] [2022-07-12 09:35:36,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:36,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:36,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:36,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:36,023 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) [2022-07-12 09:35:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:37,455 INFO L93 Difference]: Finished difference Result 4879 states and 6870 transitions. [2022-07-12 09:35:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 09:35:37,456 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 [2022-07-12 09:35:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:37,477 INFO L225 Difference]: With dead ends: 4879 [2022-07-12 09:35:37,477 INFO L226 Difference]: Without dead ends: 4047 [2022-07-12 09:35:37,486 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 [2022-07-12 09:35:37,487 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, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:35:37,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1747 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 09:35:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2022-07-12 09:35:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3595. [2022-07-12 09:35:37,681 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) [2022-07-12 09:35:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 4864 transitions. [2022-07-12 09:35:37,689 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 4864 transitions. Word has length 91 [2022-07-12 09:35:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:37,690 INFO L495 AbstractCegarLoop]: Abstraction has 3595 states and 4864 transitions. [2022-07-12 09:35:37,690 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) [2022-07-12 09:35:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 4864 transitions. [2022-07-12 09:35:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:37,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:37,692 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] [2022-07-12 09:35:37,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 09:35:37,693 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:37,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1591627881, now seen corresponding path program 1 times [2022-07-12 09:35:37,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:37,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705188158] [2022-07-12 09:35:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:37,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:37,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:37,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:37,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:37,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:37,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:37,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705188158] [2022-07-12 09:35:37,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705188158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:37,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:37,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:37,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990545398] [2022-07-12 09:35:37,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:37,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:37,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:37,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:37,774 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) [2022-07-12 09:35:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:39,161 INFO L93 Difference]: Finished difference Result 7168 states and 10400 transitions. [2022-07-12 09:35:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 09:35:39,162 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 [2022-07-12 09:35:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:39,183 INFO L225 Difference]: With dead ends: 7168 [2022-07-12 09:35:39,184 INFO L226 Difference]: Without dead ends: 5685 [2022-07-12 09:35:39,191 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 [2022-07-12 09:35:39,191 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 874 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-07-12 09:35:39,192 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] [2022-07-12 09:35:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2022-07-12 09:35:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 4902. [2022-07-12 09:35:39,479 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) [2022-07-12 09:35:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 6872 transitions. [2022-07-12 09:35:39,492 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 6872 transitions. Word has length 91 [2022-07-12 09:35:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:39,493 INFO L495 AbstractCegarLoop]: Abstraction has 4902 states and 6872 transitions. [2022-07-12 09:35:39,493 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) [2022-07-12 09:35:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 6872 transitions. [2022-07-12 09:35:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:39,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:39,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:35:39,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 09:35:39,497 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1514727083, now seen corresponding path program 1 times [2022-07-12 09:35:39,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:39,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062656563] [2022-07-12 09:35:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:39,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:39,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:39,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:39,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:39,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:39,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:39,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062656563] [2022-07-12 09:35:39,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062656563] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:39,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:39,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:39,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011465361] [2022-07-12 09:35:39,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:39,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:39,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:39,564 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) [2022-07-12 09:35:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:41,132 INFO L93 Difference]: Finished difference Result 12578 states and 18756 transitions. [2022-07-12 09:35:41,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 09:35:41,133 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 [2022-07-12 09:35:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:41,166 INFO L225 Difference]: With dead ends: 12578 [2022-07-12 09:35:41,167 INFO L226 Difference]: Without dead ends: 9788 [2022-07-12 09:35:41,179 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 [2022-07-12 09:35:41,180 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, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:35:41,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1719 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 09:35:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9788 states. [2022-07-12 09:35:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9788 to 7338. [2022-07-12 09:35:41,623 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) [2022-07-12 09:35:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7338 states to 7338 states and 10642 transitions. [2022-07-12 09:35:41,649 INFO L78 Accepts]: Start accepts. Automaton has 7338 states and 10642 transitions. Word has length 91 [2022-07-12 09:35:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:41,649 INFO L495 AbstractCegarLoop]: Abstraction has 7338 states and 10642 transitions. [2022-07-12 09:35:41,649 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) [2022-07-12 09:35:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7338 states and 10642 transitions. [2022-07-12 09:35:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:41,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:41,655 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] [2022-07-12 09:35:41,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 09:35:41,656 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash 393730707, now seen corresponding path program 1 times [2022-07-12 09:35:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601012843] [2022-07-12 09:35:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:41,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:41,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:41,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:41,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:41,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:41,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:41,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:41,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601012843] [2022-07-12 09:35:41,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601012843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:41,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:41,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:41,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551100470] [2022-07-12 09:35:41,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:41,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:41,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:41,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:41,735 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) [2022-07-12 09:35:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:43,692 INFO L93 Difference]: Finished difference Result 21544 states and 32728 transitions. [2022-07-12 09:35:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 09:35:43,692 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 [2022-07-12 09:35:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:43,755 INFO L225 Difference]: With dead ends: 21544 [2022-07-12 09:35:43,755 INFO L226 Difference]: Without dead ends: 16318 [2022-07-12 09:35:43,778 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 [2022-07-12 09:35:43,779 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 [2022-07-12 09:35:43,779 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] [2022-07-12 09:35:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16318 states. [2022-07-12 09:35:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16318 to 12351. [2022-07-12 09:35:44,494 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) [2022-07-12 09:35:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12351 states to 12351 states and 18610 transitions. [2022-07-12 09:35:44,534 INFO L78 Accepts]: Start accepts. Automaton has 12351 states and 18610 transitions. Word has length 91 [2022-07-12 09:35:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:44,536 INFO L495 AbstractCegarLoop]: Abstraction has 12351 states and 18610 transitions. [2022-07-12 09:35:44,536 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) [2022-07-12 09:35:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12351 states and 18610 transitions. [2022-07-12 09:35:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:44,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:44,547 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] [2022-07-12 09:35:44,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 09:35:44,547 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:44,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:44,548 INFO L85 PathProgramCache]: Analyzing trace with hash -98895467, now seen corresponding path program 1 times [2022-07-12 09:35:44,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:44,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475931195] [2022-07-12 09:35:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:44,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:44,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:44,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:44,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:44,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:44,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475931195] [2022-07-12 09:35:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475931195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:44,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:44,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947431413] [2022-07-12 09:35:44,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:44,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:44,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:44,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:44,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:44,621 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) [2022-07-12 09:35:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:47,170 INFO L93 Difference]: Finished difference Result 39331 states and 61206 transitions. [2022-07-12 09:35:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 09:35:47,170 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 [2022-07-12 09:35:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:47,293 INFO L225 Difference]: With dead ends: 39331 [2022-07-12 09:35:47,294 INFO L226 Difference]: Without dead ends: 29092 [2022-07-12 09:35:47,336 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 [2022-07-12 09:35:47,337 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 [2022-07-12 09:35:47,337 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] [2022-07-12 09:35:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29092 states. [2022-07-12 09:35:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29092 to 22344. [2022-07-12 09:35:48,721 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) [2022-07-12 09:35:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22344 states to 22344 states and 34998 transitions. [2022-07-12 09:35:48,801 INFO L78 Accepts]: Start accepts. Automaton has 22344 states and 34998 transitions. Word has length 91 [2022-07-12 09:35:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:48,801 INFO L495 AbstractCegarLoop]: Abstraction has 22344 states and 34998 transitions. [2022-07-12 09:35:48,802 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) [2022-07-12 09:35:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 22344 states and 34998 transitions. [2022-07-12 09:35:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:48,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:48,820 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] [2022-07-12 09:35:48,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 09:35:48,821 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:48,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash 855044691, now seen corresponding path program 1 times [2022-07-12 09:35:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:48,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879634911] [2022-07-12 09:35:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:48,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:48,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:48,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:48,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:48,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:48,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:48,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879634911] [2022-07-12 09:35:48,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879634911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:48,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:48,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:48,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161295142] [2022-07-12 09:35:48,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:48,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:48,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:48,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:48,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:48,890 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) [2022-07-12 09:35:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:35:52,542 INFO L93 Difference]: Finished difference Result 73722 states and 118220 transitions. [2022-07-12 09:35:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 09:35:52,542 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 [2022-07-12 09:35:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:35:52,762 INFO L225 Difference]: With dead ends: 73722 [2022-07-12 09:35:52,763 INFO L226 Difference]: Without dead ends: 53490 [2022-07-12 09:35:52,814 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 [2022-07-12 09:35:52,815 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 [2022-07-12 09:35:52,815 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] [2022-07-12 09:35:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53490 states. [2022-07-12 09:35:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53490 to 42265. [2022-07-12 09:35:55,168 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) [2022-07-12 09:35:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42265 states to 42265 states and 69166 transitions. [2022-07-12 09:35:55,305 INFO L78 Accepts]: Start accepts. Automaton has 42265 states and 69166 transitions. Word has length 91 [2022-07-12 09:35:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:35:55,306 INFO L495 AbstractCegarLoop]: Abstraction has 42265 states and 69166 transitions. [2022-07-12 09:35:55,306 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) [2022-07-12 09:35:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 42265 states and 69166 transitions. [2022-07-12 09:35:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:35:55,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:35:55,342 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] [2022-07-12 09:35:55,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 09:35:55,343 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:35:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:35:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -361109035, now seen corresponding path program 1 times [2022-07-12 09:35:55,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:35:55,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306860618] [2022-07-12 09:35:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:35:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:35:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:55,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:35:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:55,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:35:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:55,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:35:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:55,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:35:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:55,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:35:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:35:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:35:55,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:35:55,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306860618] [2022-07-12 09:35:55,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306860618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:35:55,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:35:55,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:35:55,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106808111] [2022-07-12 09:35:55,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:35:55,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:35:55,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:35:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:35:55,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:35:55,425 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) [2022-07-12 09:36:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:36:01,180 INFO L93 Difference]: Finished difference Result 111749 states and 179235 transitions. [2022-07-12 09:36:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 09:36:01,180 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 [2022-07-12 09:36:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:36:01,453 INFO L225 Difference]: With dead ends: 111749 [2022-07-12 09:36:01,453 INFO L226 Difference]: Without dead ends: 71597 [2022-07-12 09:36:01,595 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 [2022-07-12 09:36:01,596 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 566 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 09:36:01,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1409 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 09:36:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71597 states. [2022-07-12 09:36:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71597 to 43036. [2022-07-12 09:36:04,505 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) [2022-07-12 09:36:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43036 states to 43036 states and 69937 transitions. [2022-07-12 09:36:04,622 INFO L78 Accepts]: Start accepts. Automaton has 43036 states and 69937 transitions. Word has length 91 [2022-07-12 09:36:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:36:04,623 INFO L495 AbstractCegarLoop]: Abstraction has 43036 states and 69937 transitions. [2022-07-12 09:36:04,623 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) [2022-07-12 09:36:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 43036 states and 69937 transitions. [2022-07-12 09:36:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 09:36:04,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:36:04,656 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] [2022-07-12 09:36:04,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 09:36:04,656 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:36:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:36:04,657 INFO L85 PathProgramCache]: Analyzing trace with hash 72620051, now seen corresponding path program 1 times [2022-07-12 09:36:04,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:36:04,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339516314] [2022-07-12 09:36:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:36:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:36:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:04,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:36:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:04,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:36:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:04,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:36:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:04,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:36:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:04,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:36:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:36:04,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:36:04,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339516314] [2022-07-12 09:36:04,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339516314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:36:04,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:36:04,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:36:04,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881333998] [2022-07-12 09:36:04,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:36:04,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:36:04,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:36:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:36:04,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:36:04,783 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) [2022-07-12 09:36:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:36:14,943 INFO L93 Difference]: Finished difference Result 183726 states and 302063 transitions. [2022-07-12 09:36:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 09:36:14,943 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 [2022-07-12 09:36:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:36:15,458 INFO L225 Difference]: With dead ends: 183726 [2022-07-12 09:36:15,458 INFO L226 Difference]: Without dead ends: 142803 [2022-07-12 09:36:15,626 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 [2022-07-12 09:36:15,626 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 2047 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 09:36:15,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2077 Valid, 1539 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-12 09:36:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142803 states. [2022-07-12 09:36:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142803 to 118634. [2022-07-12 09:36:23,021 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) [2022-07-12 09:36:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118634 states to 118634 states and 193075 transitions. [2022-07-12 09:36:23,625 INFO L78 Accepts]: Start accepts. Automaton has 118634 states and 193075 transitions. Word has length 91 [2022-07-12 09:36:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:36:23,625 INFO L495 AbstractCegarLoop]: Abstraction has 118634 states and 193075 transitions. [2022-07-12 09:36:23,625 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) [2022-07-12 09:36:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 118634 states and 193075 transitions. [2022-07-12 09:36:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-12 09:36:23,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:36:23,821 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] [2022-07-12 09:36:23,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 09:36:23,822 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:36:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:36:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1917455745, now seen corresponding path program 1 times [2022-07-12 09:36:23,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:36:23,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417940502] [2022-07-12 09:36:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:36:23,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:36:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:23,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 09:36:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:23,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 09:36:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:23,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 09:36:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:23,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 09:36:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:23,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 09:36:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:23,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-12 09:36:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:23,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-12 09:36:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:23,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-12 09:36:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 09:36:23,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:36:23,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417940502] [2022-07-12 09:36:23,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417940502] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:36:23,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044362553] [2022-07-12 09:36:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:36:23,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:36:23,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:36:23,915 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) [2022-07-12 09:36:23,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 09:36:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:36:24,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 09:36:24,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:36:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 09:36:24,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:36:24,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044362553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:36:24,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 09:36:24,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-12 09:36:24,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895021616] [2022-07-12 09:36:24,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:36:24,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:36:24,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:36:24,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:36:24,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:36:24,135 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)