./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:06:37,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:06:37,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:06:37,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:06:37,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:06:37,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:06:37,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:06:37,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:06:37,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:06:37,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:06:37,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:06:37,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:06:37,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:06:37,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:06:37,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:06:37,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:06:37,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:06:37,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:06:37,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:06:37,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:06:37,792 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:06:37,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:06:37,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:06:37,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:06:37,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:06:37,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:06:37,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:06:37,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:06:37,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:06:37,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:06:37,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:06:37,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:06:37,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:06:37,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:06:37,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:06:37,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:06:37,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:06:37,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:06:37,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:06:37,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:06:37,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:06:37,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:06:37,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:06:37,831 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:06:37,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:06:37,832 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:06:37,832 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:06:37,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:06:37,833 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:06:37,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:06:37,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:06:37,834 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:06:37,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:06:37,835 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:06:37,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:06:37,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:06:37,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:06:37,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:06:37,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:06:37,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:06:37,836 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:06:37,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:06:37,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:06:37,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:06:37,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:06:37,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:06:37,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:06:37,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:06:37,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:06:37,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:06:37,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:06:37,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:06:37,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:06:37,839 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:06:37,839 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:06:37,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:06:37,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd [2022-07-21 08:06:38,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:06:38,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:06:38,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:06:38,202 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:06:38,203 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:06:38,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2022-07-21 08:06:38,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8291972/da06688892314bccadc3a6f377e2d266/FLAGe0d417815 [2022-07-21 08:06:38,831 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:06:38,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2022-07-21 08:06:38,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8291972/da06688892314bccadc3a6f377e2d266/FLAGe0d417815 [2022-07-21 08:06:39,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8291972/da06688892314bccadc3a6f377e2d266 [2022-07-21 08:06:39,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:06:39,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:06:39,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:06:39,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:06:39,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:06:39,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cd4503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39, skipping insertion in model container [2022-07-21 08:06:39,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:06:39,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:06:39,470 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[914,927] [2022-07-21 08:06:39,546 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[7115,7128] [2022-07-21 08:06:39,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:06:39,619 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:06:39,629 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[914,927] [2022-07-21 08:06:39,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[7115,7128] [2022-07-21 08:06:39,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:06:39,741 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:06:39,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39 WrapperNode [2022-07-21 08:06:39,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:06:39,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:06:39,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:06:39,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:06:39,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,828 INFO L137 Inliner]: procedures = 67, calls = 79, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 755 [2022-07-21 08:06:39,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:06:39,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:06:39,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:06:39,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:06:39,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:06:39,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:06:39,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:06:39,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:06:39,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (1/1) ... [2022-07-21 08:06:39,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:06:39,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:06:39,945 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) [2022-07-21 08:06:39,947 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 [2022-07-21 08:06:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:06:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-21 08:06:39,978 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-21 08:06:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-07-21 08:06:39,978 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-07-21 08:06:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-21 08:06:39,978 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-21 08:06:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-21 08:06:39,978 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-21 08:06:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-07-21 08:06:39,979 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-07-21 08:06:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-21 08:06:39,979 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-21 08:06:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-21 08:06:39,979 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-21 08:06:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-07-21 08:06:39,979 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-07-21 08:06:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-07-21 08:06:39,979 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-07-21 08:06:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-07-21 08:06:39,979 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-07-21 08:06:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-21 08:06:39,980 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-21 08:06:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:06:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-21 08:06:39,980 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-21 08:06:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-07-21 08:06:39,980 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-07-21 08:06:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:06:39,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:06:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-21 08:06:39,980 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-21 08:06:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-21 08:06:39,981 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-21 08:06:40,077 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:06:40,079 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:06:40,840 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:06:40,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:06:40,857 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2022-07-21 08:06:40,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:06:40 BoogieIcfgContainer [2022-07-21 08:06:40,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:06:40,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:06:40,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:06:40,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:06:40,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:06:39" (1/3) ... [2022-07-21 08:06:40,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a128ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:06:40, skipping insertion in model container [2022-07-21 08:06:40,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:06:39" (2/3) ... [2022-07-21 08:06:40,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a128ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:06:40, skipping insertion in model container [2022-07-21 08:06:40,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:06:40" (3/3) ... [2022-07-21 08:06:40,870 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2022-07-21 08:06:40,883 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:06:40,883 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 08:06:40,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:06:40,943 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@487d119e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@754a57a8 [2022-07-21 08:06:40,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:06:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 311 states have (on average 1.6205787781350482) internal successors, (504), 319 states have internal predecessors, (504), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-21 08:06:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 08:06:40,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:40,960 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] [2022-07-21 08:06:40,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1360309696, now seen corresponding path program 1 times [2022-07-21 08:06:40,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:40,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782755500] [2022-07-21 08:06:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:40,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:41,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:41,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:41,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:41,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:41,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:41,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:41,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:41,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782755500] [2022-07-21 08:06:41,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782755500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:41,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:41,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:06:41,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845116947] [2022-07-21 08:06:41,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:41,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:06:41,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:41,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:06:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:06:41,250 INFO L87 Difference]: Start difference. First operand has 366 states, 311 states have (on average 1.6205787781350482) internal successors, (504), 319 states have internal predecessors, (504), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 08:06:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:41,925 INFO L93 Difference]: Finished difference Result 727 states and 1147 transitions. [2022-07-21 08:06:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:06:41,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-07-21 08:06:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:41,949 INFO L225 Difference]: With dead ends: 727 [2022-07-21 08:06:41,949 INFO L226 Difference]: Without dead ends: 373 [2022-07-21 08:06:41,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:06:41,961 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 549 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:41,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1489 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 08:06:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-21 08:06:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 355. [2022-07-21 08:06:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 303 states have (on average 1.528052805280528) internal successors, (463), 308 states have internal predecessors, (463), 37 states have call successors, (37), 15 states have call predecessors, (37), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-21 08:06:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 533 transitions. [2022-07-21 08:06:42,062 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 533 transitions. Word has length 65 [2022-07-21 08:06:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:42,063 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 533 transitions. [2022-07-21 08:06:42,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 08:06:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 533 transitions. [2022-07-21 08:06:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 08:06:42,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:42,067 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] [2022-07-21 08:06:42,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:06:42,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:42,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1400984446, now seen corresponding path program 1 times [2022-07-21 08:06:42,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:42,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093190825] [2022-07-21 08:06:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:42,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:42,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:42,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:42,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:42,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:42,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:42,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:42,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:42,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093190825] [2022-07-21 08:06:42,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093190825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:42,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:42,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:06:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878626392] [2022-07-21 08:06:42,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:42,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:06:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:06:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:06:42,272 INFO L87 Difference]: Start difference. First operand 355 states and 533 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 08:06:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:43,070 INFO L93 Difference]: Finished difference Result 578 states and 847 transitions. [2022-07-21 08:06:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:06:43,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-07-21 08:06:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:43,074 INFO L225 Difference]: With dead ends: 578 [2022-07-21 08:06:43,074 INFO L226 Difference]: Without dead ends: 490 [2022-07-21 08:06:43,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:06:43,076 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 899 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:43,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 1528 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 08:06:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-07-21 08:06:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 451. [2022-07-21 08:06:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 379 states have (on average 1.4960422163588392) internal successors, (567), 386 states have internal predecessors, (567), 48 states have call successors, (48), 22 states have call predecessors, (48), 22 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2022-07-21 08:06:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 664 transitions. [2022-07-21 08:06:43,109 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 664 transitions. Word has length 65 [2022-07-21 08:06:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:43,109 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 664 transitions. [2022-07-21 08:06:43,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 08:06:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 664 transitions. [2022-07-21 08:06:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 08:06:43,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:43,112 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] [2022-07-21 08:06:43,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:06:43,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash -997198495, now seen corresponding path program 1 times [2022-07-21 08:06:43,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:43,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011169216] [2022-07-21 08:06:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:43,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:43,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:43,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:43,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:43,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:43,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:43,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011169216] [2022-07-21 08:06:43,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011169216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:43,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:43,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:06:43,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892030926] [2022-07-21 08:06:43,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:43,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:06:43,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:06:43,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:06:43,235 INFO L87 Difference]: Start difference. First operand 451 states and 664 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 08:06:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:44,238 INFO L93 Difference]: Finished difference Result 798 states and 1140 transitions. [2022-07-21 08:06:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 08:06:44,244 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 [2022-07-21 08:06:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:44,253 INFO L225 Difference]: With dead ends: 798 [2022-07-21 08:06:44,253 INFO L226 Difference]: Without dead ends: 621 [2022-07-21 08:06:44,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-21 08:06:44,261 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 1091 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:44,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 2058 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 08:06:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-07-21 08:06:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 547. [2022-07-21 08:06:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 455 states have (on average 1.4725274725274726) internal successors, (670), 464 states have internal predecessors, (670), 59 states have call successors, (59), 29 states have call predecessors, (59), 31 states have return successors, (68), 57 states have call predecessors, (68), 55 states have call successors, (68) [2022-07-21 08:06:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 797 transitions. [2022-07-21 08:06:44,316 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 797 transitions. Word has length 65 [2022-07-21 08:06:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:44,316 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 797 transitions. [2022-07-21 08:06:44,317 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) [2022-07-21 08:06:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 797 transitions. [2022-07-21 08:06:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 08:06:44,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:44,325 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] [2022-07-21 08:06:44,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:06:44,326 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1269182691, now seen corresponding path program 1 times [2022-07-21 08:06:44,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:44,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485849318] [2022-07-21 08:06:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:44,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:44,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:44,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:44,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:44,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:44,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:44,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485849318] [2022-07-21 08:06:44,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485849318] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:44,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:44,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:06:44,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966241553] [2022-07-21 08:06:44,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:44,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:06:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:44,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:06:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:06:44,474 INFO L87 Difference]: Start difference. First operand 547 states and 797 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:06:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:45,323 INFO L93 Difference]: Finished difference Result 874 states and 1251 transitions. [2022-07-21 08:06:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 08:06:45,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-07-21 08:06:45,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:45,327 INFO L225 Difference]: With dead ends: 874 [2022-07-21 08:06:45,327 INFO L226 Difference]: Without dead ends: 607 [2022-07-21 08:06:45,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:06:45,329 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 669 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:45,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 2102 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 08:06:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-07-21 08:06:45,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 562. [2022-07-21 08:06:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 467 states have (on average 1.4603854389721627) internal successors, (682), 476 states have internal predecessors, (682), 59 states have call successors, (59), 29 states have call predecessors, (59), 34 states have return successors, (71), 60 states have call predecessors, (71), 55 states have call successors, (71) [2022-07-21 08:06:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 812 transitions. [2022-07-21 08:06:45,355 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 812 transitions. Word has length 65 [2022-07-21 08:06:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:45,355 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 812 transitions. [2022-07-21 08:06:45,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:06:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 812 transitions. [2022-07-21 08:06:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 08:06:45,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:45,357 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] [2022-07-21 08:06:45,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:06:45,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:45,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:45,358 INFO L85 PathProgramCache]: Analyzing trace with hash -117020703, now seen corresponding path program 1 times [2022-07-21 08:06:45,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:45,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911475050] [2022-07-21 08:06:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:45,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:45,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:45,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:45,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:45,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:45,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:45,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:45,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:45,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:45,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911475050] [2022-07-21 08:06:45,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911475050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:45,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:45,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:06:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285338999] [2022-07-21 08:06:45,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:45,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:06:45,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:06:45,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:06:45,470 INFO L87 Difference]: Start difference. First operand 562 states and 812 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:06:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:46,305 INFO L93 Difference]: Finished difference Result 880 states and 1244 transitions. [2022-07-21 08:06:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:06:46,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-07-21 08:06:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:46,310 INFO L225 Difference]: With dead ends: 880 [2022-07-21 08:06:46,310 INFO L226 Difference]: Without dead ends: 598 [2022-07-21 08:06:46,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-21 08:06:46,312 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 671 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:46,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 2100 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 08:06:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-07-21 08:06:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 567. [2022-07-21 08:06:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 471 states have (on average 1.4522292993630572) internal successors, (684), 480 states have internal predecessors, (684), 59 states have call successors, (59), 29 states have call predecessors, (59), 35 states have return successors, (72), 61 states have call predecessors, (72), 55 states have call successors, (72) [2022-07-21 08:06:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 815 transitions. [2022-07-21 08:06:46,338 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 815 transitions. Word has length 65 [2022-07-21 08:06:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:46,339 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 815 transitions. [2022-07-21 08:06:46,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:06:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 815 transitions. [2022-07-21 08:06:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 08:06:46,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:46,341 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] [2022-07-21 08:06:46,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:06:46,341 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:46,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1146380001, now seen corresponding path program 1 times [2022-07-21 08:06:46,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:46,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635081215] [2022-07-21 08:06:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:46,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:46,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:46,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:46,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:46,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:46,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:46,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:46,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:46,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635081215] [2022-07-21 08:06:46,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635081215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:46,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:46,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 08:06:46,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003816289] [2022-07-21 08:06:46,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:46,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:06:46,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:06:46,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:06:46,474 INFO L87 Difference]: Start difference. First operand 567 states and 815 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 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) [2022-07-21 08:06:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:48,023 INFO L93 Difference]: Finished difference Result 1923 states and 2656 transitions. [2022-07-21 08:06:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 08:06:48,024 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), 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 65 [2022-07-21 08:06:48,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:48,032 INFO L225 Difference]: With dead ends: 1923 [2022-07-21 08:06:48,032 INFO L226 Difference]: Without dead ends: 1618 [2022-07-21 08:06:48,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 08:06:48,035 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 3092 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3107 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:48,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3107 Valid, 2039 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 08:06:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-07-21 08:06:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1483. [2022-07-21 08:06:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1198 states have (on average 1.3664440734557597) internal successors, (1637), 1222 states have internal predecessors, (1637), 147 states have call successors, (147), 112 states have call predecessors, (147), 136 states have return successors, (189), 151 states have call predecessors, (189), 143 states have call successors, (189) [2022-07-21 08:06:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 1973 transitions. [2022-07-21 08:06:48,102 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 1973 transitions. Word has length 65 [2022-07-21 08:06:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:48,102 INFO L495 AbstractCegarLoop]: Abstraction has 1483 states and 1973 transitions. [2022-07-21 08:06:48,102 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), 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) [2022-07-21 08:06:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 1973 transitions. [2022-07-21 08:06:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 08:06:48,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:48,104 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] [2022-07-21 08:06:48,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:06:48,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:48,105 INFO L85 PathProgramCache]: Analyzing trace with hash -166967177, now seen corresponding path program 1 times [2022-07-21 08:06:48,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:48,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196914692] [2022-07-21 08:06:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:48,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:48,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:48,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:48,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:48,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:48,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:48,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:48,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:48,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:48,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196914692] [2022-07-21 08:06:48,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196914692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:48,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:48,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:06:48,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406809065] [2022-07-21 08:06:48,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:48,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:06:48,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:06:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:06:48,190 INFO L87 Difference]: Start difference. First operand 1483 states and 1973 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 08:06:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:49,139 INFO L93 Difference]: Finished difference Result 2762 states and 3559 transitions. [2022-07-21 08:06:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:06:49,140 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 [2022-07-21 08:06:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:49,150 INFO L225 Difference]: With dead ends: 2762 [2022-07-21 08:06:49,150 INFO L226 Difference]: Without dead ends: 1770 [2022-07-21 08:06:49,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-07-21 08:06:49,157 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 1043 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:49,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 1808 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 08:06:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-07-21 08:06:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1425. [2022-07-21 08:06:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1156 states have (on average 1.3624567474048443) internal successors, (1575), 1175 states have internal predecessors, (1575), 141 states have call successors, (141), 107 states have call predecessors, (141), 126 states have return successors, (174), 144 states have call predecessors, (174), 137 states have call successors, (174) [2022-07-21 08:06:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1890 transitions. [2022-07-21 08:06:49,226 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1890 transitions. Word has length 65 [2022-07-21 08:06:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:49,227 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 1890 transitions. [2022-07-21 08:06:49,227 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) [2022-07-21 08:06:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1890 transitions. [2022-07-21 08:06:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 08:06:49,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:49,233 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] [2022-07-21 08:06:49,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:06:49,233 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash -300980683, now seen corresponding path program 1 times [2022-07-21 08:06:49,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:49,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288247534] [2022-07-21 08:06:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:49,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:49,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288247534] [2022-07-21 08:06:49,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288247534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:49,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:49,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:06:49,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179038720] [2022-07-21 08:06:49,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:49,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:06:49,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:06:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:06:49,319 INFO L87 Difference]: Start difference. First operand 1425 states and 1890 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 08:06:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:49,755 INFO L93 Difference]: Finished difference Result 3787 states and 4887 transitions. [2022-07-21 08:06:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 08:06:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-07-21 08:06:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:49,768 INFO L225 Difference]: With dead ends: 3787 [2022-07-21 08:06:49,769 INFO L226 Difference]: Without dead ends: 2631 [2022-07-21 08:06:49,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-07-21 08:06:49,774 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 1530 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:49,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1558 Valid, 1028 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 08:06:49,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-07-21 08:06:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2483. [2022-07-21 08:06:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 1974 states have (on average 1.3034447821681865) internal successors, (2573), 2009 states have internal predecessors, (2573), 257 states have call successors, (257), 206 states have call predecessors, (257), 250 states have return successors, (362), 269 states have call predecessors, (362), 253 states have call successors, (362) [2022-07-21 08:06:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3192 transitions. [2022-07-21 08:06:49,905 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3192 transitions. Word has length 65 [2022-07-21 08:06:49,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:49,905 INFO L495 AbstractCegarLoop]: Abstraction has 2483 states and 3192 transitions. [2022-07-21 08:06:49,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 08:06:49,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3192 transitions. [2022-07-21 08:06:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 08:06:49,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:49,906 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] [2022-07-21 08:06:49,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:06:49,907 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:49,907 INFO L85 PathProgramCache]: Analyzing trace with hash -57595364, now seen corresponding path program 1 times [2022-07-21 08:06:49,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:49,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444739961] [2022-07-21 08:06:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:49,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:49,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444739961] [2022-07-21 08:06:49,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444739961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:49,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:49,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:06:49,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149337925] [2022-07-21 08:06:49,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:49,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:06:49,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:49,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:06:49,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:06:49,985 INFO L87 Difference]: Start difference. First operand 2483 states and 3192 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:06:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:50,566 INFO L93 Difference]: Finished difference Result 5763 states and 7313 transitions. [2022-07-21 08:06:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:06:50,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-21 08:06:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:50,584 INFO L225 Difference]: With dead ends: 5763 [2022-07-21 08:06:50,585 INFO L226 Difference]: Without dead ends: 3549 [2022-07-21 08:06:50,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:06:50,593 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 877 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:50,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1256 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 08:06:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2022-07-21 08:06:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3253. [2022-07-21 08:06:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3253 states, 2573 states have (on average 1.2883793237465992) internal successors, (3315), 2613 states have internal predecessors, (3315), 341 states have call successors, (341), 279 states have call predecessors, (341), 337 states have return successors, (466), 362 states have call predecessors, (466), 337 states have call successors, (466) [2022-07-21 08:06:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3253 states to 3253 states and 4122 transitions. [2022-07-21 08:06:50,789 INFO L78 Accepts]: Start accepts. Automaton has 3253 states and 4122 transitions. Word has length 66 [2022-07-21 08:06:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:50,790 INFO L495 AbstractCegarLoop]: Abstraction has 3253 states and 4122 transitions. [2022-07-21 08:06:50,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:06:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3253 states and 4122 transitions. [2022-07-21 08:06:50,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 08:06:50,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:50,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:06:50,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:06:50,792 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1644831941, now seen corresponding path program 1 times [2022-07-21 08:06:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:50,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144654917] [2022-07-21 08:06:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:50,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:50,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:50,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:50,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:50,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:50,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:50,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:50,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:50,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144654917] [2022-07-21 08:06:50,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144654917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:50,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:50,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:06:50,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173375821] [2022-07-21 08:06:50,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:50,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:06:50,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:50,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:06:50,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:06:50,868 INFO L87 Difference]: Start difference. First operand 3253 states and 4122 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:06:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:51,326 INFO L93 Difference]: Finished difference Result 6797 states and 8495 transitions. [2022-07-21 08:06:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:06:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-07-21 08:06:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:51,350 INFO L225 Difference]: With dead ends: 6797 [2022-07-21 08:06:51,350 INFO L226 Difference]: Without dead ends: 3812 [2022-07-21 08:06:51,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:06:51,359 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 1223 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:51,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 1087 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 08:06:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3812 states. [2022-07-21 08:06:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3812 to 3531. [2022-07-21 08:06:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 2794 states have (on average 1.280959198282033) internal successors, (3579), 2836 states have internal predecessors, (3579), 369 states have call successors, (369), 304 states have call predecessors, (369), 366 states have return successors, (498), 392 states have call predecessors, (498), 365 states have call successors, (498) [2022-07-21 08:06:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4446 transitions. [2022-07-21 08:06:51,549 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4446 transitions. Word has length 72 [2022-07-21 08:06:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:51,551 INFO L495 AbstractCegarLoop]: Abstraction has 3531 states and 4446 transitions. [2022-07-21 08:06:51,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:06:51,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4446 transitions. [2022-07-21 08:06:51,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 08:06:51,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:51,552 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:06:51,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:06:51,553 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:51,554 INFO L85 PathProgramCache]: Analyzing trace with hash 33226707, now seen corresponding path program 1 times [2022-07-21 08:06:51,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:51,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919694326] [2022-07-21 08:06:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:51,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:51,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:51,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:51,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:51,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:51,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:51,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:51,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:51,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919694326] [2022-07-21 08:06:51,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919694326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:51,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:51,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:06:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85231433] [2022-07-21 08:06:51,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:51,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:06:51,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:06:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:06:51,638 INFO L87 Difference]: Start difference. First operand 3531 states and 4446 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 08:06:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:52,207 INFO L93 Difference]: Finished difference Result 4630 states and 5757 transitions. [2022-07-21 08:06:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:06:52,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2022-07-21 08:06:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:52,228 INFO L225 Difference]: With dead ends: 4630 [2022-07-21 08:06:52,228 INFO L226 Difference]: Without dead ends: 4627 [2022-07-21 08:06:52,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-21 08:06:52,231 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 1731 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:52,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1741 Valid, 1067 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 08:06:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2022-07-21 08:06:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3993. [2022-07-21 08:06:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3149 states have (on average 1.2696093998094633) internal successors, (3998), 3194 states have internal predecessors, (3998), 419 states have call successors, (419), 348 states have call predecessors, (419), 423 states have return successors, (575), 452 states have call predecessors, (575), 416 states have call successors, (575) [2022-07-21 08:06:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 4992 transitions. [2022-07-21 08:06:52,450 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 4992 transitions. Word has length 73 [2022-07-21 08:06:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:52,451 INFO L495 AbstractCegarLoop]: Abstraction has 3993 states and 4992 transitions. [2022-07-21 08:06:52,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 08:06:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 4992 transitions. [2022-07-21 08:06:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 08:06:52,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:52,452 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:06:52,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:06:52,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1028933253, now seen corresponding path program 1 times [2022-07-21 08:06:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:52,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637735862] [2022-07-21 08:06:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:52,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:52,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:52,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:52,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:52,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:52,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:52,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637735862] [2022-07-21 08:06:52,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637735862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:06:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820640673] [2022-07-21 08:06:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:52,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:06:52,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:06:52,575 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) [2022-07-21 08:06:52,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:06:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:52,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:06:52,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:06:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:53,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:06:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:53,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820640673] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:06:53,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:06:53,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2022-07-21 08:06:53,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899632361] [2022-07-21 08:06:53,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:06:53,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:06:53,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:06:53,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:06:53,381 INFO L87 Difference]: Start difference. First operand 3993 states and 4992 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-21 08:06:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:55,152 INFO L93 Difference]: Finished difference Result 8338 states and 10243 transitions. [2022-07-21 08:06:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 08:06:55,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2022-07-21 08:06:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:55,189 INFO L225 Difference]: With dead ends: 8338 [2022-07-21 08:06:55,189 INFO L226 Difference]: Without dead ends: 8335 [2022-07-21 08:06:55,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2022-07-21 08:06:55,195 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1404 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 2570 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:55,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1463 Valid, 2570 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 08:06:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2022-07-21 08:06:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 7410. [2022-07-21 08:06:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 5824 states have (on average 1.2520604395604396) internal successors, (7292), 5904 states have internal predecessors, (7292), 778 states have call successors, (778), 662 states have call predecessors, (778), 806 states have return successors, (1076), 845 states have call predecessors, (1076), 775 states have call successors, (1076) [2022-07-21 08:06:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 9146 transitions. [2022-07-21 08:06:55,674 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 9146 transitions. Word has length 74 [2022-07-21 08:06:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:55,674 INFO L495 AbstractCegarLoop]: Abstraction has 7410 states and 9146 transitions. [2022-07-21 08:06:55,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-21 08:06:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 9146 transitions. [2022-07-21 08:06:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 08:06:55,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:55,676 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:06:55,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:06:55,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 08:06:55,892 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1516349741, now seen corresponding path program 2 times [2022-07-21 08:06:55,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:55,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709338472] [2022-07-21 08:06:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:55,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:55,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:55,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:55,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:55,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:55,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:55,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:55,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:55,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:55,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709338472] [2022-07-21 08:06:55,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709338472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:55,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:55,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:06:55,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044314181] [2022-07-21 08:06:55,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:55,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:06:55,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:55,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:06:55,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:06:55,964 INFO L87 Difference]: Start difference. First operand 7410 states and 9146 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 08:06:56,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:56,530 INFO L93 Difference]: Finished difference Result 10011 states and 12368 transitions. [2022-07-21 08:06:56,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:06:56,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2022-07-21 08:06:56,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:56,546 INFO L225 Difference]: With dead ends: 10011 [2022-07-21 08:06:56,547 INFO L226 Difference]: Without dead ends: 3837 [2022-07-21 08:06:56,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:06:56,558 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 928 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:56,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 1389 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 08:06:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3837 states. [2022-07-21 08:06:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3837 to 2844. [2022-07-21 08:06:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2262 states have (on average 1.259946949602122) internal successors, (2850), 2288 states have internal predecessors, (2850), 298 states have call successors, (298), 245 states have call predecessors, (298), 282 states have return successors, (377), 312 states have call predecessors, (377), 295 states have call successors, (377) [2022-07-21 08:06:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 3525 transitions. [2022-07-21 08:06:56,714 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 3525 transitions. Word has length 77 [2022-07-21 08:06:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:56,714 INFO L495 AbstractCegarLoop]: Abstraction has 2844 states and 3525 transitions. [2022-07-21 08:06:56,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 08:06:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 3525 transitions. [2022-07-21 08:06:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 08:06:56,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:56,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:06:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:06:56,717 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash 522255415, now seen corresponding path program 1 times [2022-07-21 08:06:56,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:56,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221872131] [2022-07-21 08:06:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:56,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:56,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:56,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:56,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:56,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:56,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:56,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:56,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:56,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 08:06:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:06:56,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221872131] [2022-07-21 08:06:56,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221872131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:56,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:56,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:06:56,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777492809] [2022-07-21 08:06:56,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:56,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:06:56,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:56,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:06:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:06:56,785 INFO L87 Difference]: Start difference. First operand 2844 states and 3525 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 08:06:57,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:57,933 INFO L93 Difference]: Finished difference Result 8040 states and 9826 transitions. [2022-07-21 08:06:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 08:06:57,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2022-07-21 08:06:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:57,960 INFO L225 Difference]: With dead ends: 8040 [2022-07-21 08:06:57,960 INFO L226 Difference]: Without dead ends: 5465 [2022-07-21 08:06:57,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-07-21 08:06:57,968 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 924 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:57,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 2154 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 08:06:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2022-07-21 08:06:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 5158. [2022-07-21 08:06:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5158 states, 4010 states have (on average 1.2231920199501247) internal successors, (4905), 4110 states have internal predecessors, (4905), 565 states have call successors, (565), 473 states have call predecessors, (565), 581 states have return successors, (822), 577 states have call predecessors, (822), 562 states have call successors, (822) [2022-07-21 08:06:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5158 states to 5158 states and 6292 transitions. [2022-07-21 08:06:58,271 INFO L78 Accepts]: Start accepts. Automaton has 5158 states and 6292 transitions. Word has length 84 [2022-07-21 08:06:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:58,271 INFO L495 AbstractCegarLoop]: Abstraction has 5158 states and 6292 transitions. [2022-07-21 08:06:58,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 08:06:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 5158 states and 6292 transitions. [2022-07-21 08:06:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 08:06:58,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:58,277 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:06:58,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 08:06:58,277 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:58,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash -315104239, now seen corresponding path program 1 times [2022-07-21 08:06:58,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377650951] [2022-07-21 08:06:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:58,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:58,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:58,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 08:06:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:58,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:58,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 08:06:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:58,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:06:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:58,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 08:06:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:58,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 08:06:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:58,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-21 08:06:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:06:58,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:58,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377650951] [2022-07-21 08:06:58,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377650951] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:58,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:58,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:06:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781085538] [2022-07-21 08:06:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:58,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:06:58,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:06:58,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:06:58,361 INFO L87 Difference]: Start difference. First operand 5158 states and 6292 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) [2022-07-21 08:06:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:06:59,562 INFO L93 Difference]: Finished difference Result 8060 states and 9812 transitions. [2022-07-21 08:06:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 08:06:59,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2022-07-21 08:06:59,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:06:59,575 INFO L225 Difference]: With dead ends: 8060 [2022-07-21 08:06:59,575 INFO L226 Difference]: Without dead ends: 3762 [2022-07-21 08:06:59,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-07-21 08:06:59,584 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 1869 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1903 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 08:06:59,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1903 Valid, 1637 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 08:06:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2022-07-21 08:06:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3393. [2022-07-21 08:06:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2640 states have (on average 1.2166666666666666) internal successors, (3212), 2711 states have internal predecessors, (3212), 367 states have call successors, (367), 300 states have call predecessors, (367), 384 states have return successors, (507), 384 states have call predecessors, (507), 364 states have call successors, (507) [2022-07-21 08:06:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 4086 transitions. [2022-07-21 08:06:59,772 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 4086 transitions. Word has length 93 [2022-07-21 08:06:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:06:59,772 INFO L495 AbstractCegarLoop]: Abstraction has 3393 states and 4086 transitions. [2022-07-21 08:06:59,773 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) [2022-07-21 08:06:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 4086 transitions. [2022-07-21 08:06:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:06:59,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:06:59,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:06:59,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 08:06:59,778 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:06:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:06:59,778 INFO L85 PathProgramCache]: Analyzing trace with hash -909909463, now seen corresponding path program 1 times [2022-07-21 08:06:59,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:06:59,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817998356] [2022-07-21 08:06:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:06:59,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:06:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:59,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:06:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:59,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:06:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:59,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:06:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:59,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:06:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:59,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:06:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:06:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:06:59,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:06:59,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817998356] [2022-07-21 08:06:59,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817998356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:06:59,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:06:59,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:06:59,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107104584] [2022-07-21 08:06:59,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:06:59,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:06:59,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:06:59,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:06:59,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:06:59,881 INFO L87 Difference]: Start difference. First operand 3393 states and 4086 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 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) [2022-07-21 08:07:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:00,931 INFO L93 Difference]: Finished difference Result 3730 states and 4624 transitions. [2022-07-21 08:07:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:07:00,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:00,940 INFO L225 Difference]: With dead ends: 3730 [2022-07-21 08:07:00,940 INFO L226 Difference]: Without dead ends: 3480 [2022-07-21 08:07:00,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:07:00,943 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 768 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:00,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1012 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 08:07:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2022-07-21 08:07:01,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3393. [2022-07-21 08:07:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2640 states have (on average 1.2162878787878788) internal successors, (3211), 2711 states have internal predecessors, (3211), 367 states have call successors, (367), 300 states have call predecessors, (367), 384 states have return successors, (507), 384 states have call predecessors, (507), 364 states have call successors, (507) [2022-07-21 08:07:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 4085 transitions. [2022-07-21 08:07:01,219 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 4085 transitions. Word has length 124 [2022-07-21 08:07:01,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:01,219 INFO L495 AbstractCegarLoop]: Abstraction has 3393 states and 4085 transitions. [2022-07-21 08:07:01,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 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) [2022-07-21 08:07:01,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 4085 transitions. [2022-07-21 08:07:01,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:01,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:01,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:01,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 08:07:01,223 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:01,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:01,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1657912871, now seen corresponding path program 1 times [2022-07-21 08:07:01,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:01,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400866663] [2022-07-21 08:07:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:01,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:01,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:01,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:01,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:01,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:01,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:01,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400866663] [2022-07-21 08:07:01,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400866663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:01,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:01,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:07:01,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724945087] [2022-07-21 08:07:01,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:01,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:07:01,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:07:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:07:01,339 INFO L87 Difference]: Start difference. First operand 3393 states and 4085 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 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) [2022-07-21 08:07:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:03,223 INFO L93 Difference]: Finished difference Result 4063 states and 5156 transitions. [2022-07-21 08:07:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:07:03,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:03,235 INFO L225 Difference]: With dead ends: 4063 [2022-07-21 08:07:03,235 INFO L226 Difference]: Without dead ends: 3819 [2022-07-21 08:07:03,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:07:03,239 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 1210 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:03,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1234 Valid, 1413 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 08:07:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3819 states. [2022-07-21 08:07:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3819 to 3644. [2022-07-21 08:07:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 2868 states have (on average 1.2454672245467224) internal successors, (3572), 2940 states have internal predecessors, (3572), 383 states have call successors, (383), 306 states have call predecessors, (383), 391 states have return successors, (526), 400 states have call predecessors, (526), 380 states have call successors, (526) [2022-07-21 08:07:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 4481 transitions. [2022-07-21 08:07:03,544 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 4481 transitions. Word has length 124 [2022-07-21 08:07:03,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:03,544 INFO L495 AbstractCegarLoop]: Abstraction has 3644 states and 4481 transitions. [2022-07-21 08:07:03,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 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) [2022-07-21 08:07:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 4481 transitions. [2022-07-21 08:07:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:03,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:03,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:03,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 08:07:03,550 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash 640264483, now seen corresponding path program 1 times [2022-07-21 08:07:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:03,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371243570] [2022-07-21 08:07:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:03,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:03,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:03,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:03,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:03,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:03,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:03,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:03,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371243570] [2022-07-21 08:07:03,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371243570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:03,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:03,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:03,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301242814] [2022-07-21 08:07:03,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:03,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:03,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:03,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:03,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:03,665 INFO L87 Difference]: Start difference. First operand 3644 states and 4481 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:05,964 INFO L93 Difference]: Finished difference Result 4661 states and 6105 transitions. [2022-07-21 08:07:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:07:05,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:05,977 INFO L225 Difference]: With dead ends: 4661 [2022-07-21 08:07:05,977 INFO L226 Difference]: Without dead ends: 4166 [2022-07-21 08:07:05,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-21 08:07:05,981 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 1217 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:05,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 2317 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-21 08:07:05,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2022-07-21 08:07:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3878. [2022-07-21 08:07:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3079 states have (on average 1.2663202338421566) internal successors, (3899), 3152 states have internal predecessors, (3899), 399 states have call successors, (399), 312 states have call predecessors, (399), 398 states have return successors, (544), 417 states have call predecessors, (544), 396 states have call successors, (544) [2022-07-21 08:07:06,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 4842 transitions. [2022-07-21 08:07:06,259 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 4842 transitions. Word has length 124 [2022-07-21 08:07:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:06,260 INFO L495 AbstractCegarLoop]: Abstraction has 3878 states and 4842 transitions. [2022-07-21 08:07:06,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 4842 transitions. [2022-07-21 08:07:06,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:06,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:06,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:06,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 08:07:06,264 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash 758705957, now seen corresponding path program 1 times [2022-07-21 08:07:06,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:06,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373167406] [2022-07-21 08:07:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:06,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:06,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:06,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:06,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:06,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:06,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:06,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373167406] [2022-07-21 08:07:06,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373167406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:06,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:06,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:06,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132255948] [2022-07-21 08:07:06,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:06,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:06,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:06,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:06,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:06,391 INFO L87 Difference]: Start difference. First operand 3878 states and 4842 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:08,353 INFO L93 Difference]: Finished difference Result 5542 states and 7494 transitions. [2022-07-21 08:07:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:07:08,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:08,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:08,369 INFO L225 Difference]: With dead ends: 5542 [2022-07-21 08:07:08,369 INFO L226 Difference]: Without dead ends: 4813 [2022-07-21 08:07:08,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-21 08:07:08,377 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 1214 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:08,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 2309 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2196 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 08:07:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2022-07-21 08:07:08,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 4347. [2022-07-21 08:07:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 3502 states have (on average 1.3003997715591091) internal successors, (4554), 3577 states have internal predecessors, (4554), 431 states have call successors, (431), 324 states have call predecessors, (431), 412 states have return successors, (584), 451 states have call predecessors, (584), 428 states have call successors, (584) [2022-07-21 08:07:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 5569 transitions. [2022-07-21 08:07:08,743 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 5569 transitions. Word has length 124 [2022-07-21 08:07:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:08,743 INFO L495 AbstractCegarLoop]: Abstraction has 4347 states and 5569 transitions. [2022-07-21 08:07:08,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 5569 transitions. [2022-07-21 08:07:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:08,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:08,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:08,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 08:07:08,748 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2146967325, now seen corresponding path program 1 times [2022-07-21 08:07:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:08,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682185612] [2022-07-21 08:07:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:08,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:08,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:08,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:08,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:08,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:08,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:08,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:08,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682185612] [2022-07-21 08:07:08,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682185612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:08,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:08,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:08,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488071040] [2022-07-21 08:07:08,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:08,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:08,871 INFO L87 Difference]: Start difference. First operand 4347 states and 5569 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:10,257 INFO L93 Difference]: Finished difference Result 5999 states and 8212 transitions. [2022-07-21 08:07:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:07:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:10,270 INFO L225 Difference]: With dead ends: 5999 [2022-07-21 08:07:10,270 INFO L226 Difference]: Without dead ends: 4801 [2022-07-21 08:07:10,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:07:10,277 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 941 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:10,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 1391 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 08:07:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2022-07-21 08:07:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 4347. [2022-07-21 08:07:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 3502 states have (on average 1.2989720159908624) internal successors, (4549), 3577 states have internal predecessors, (4549), 431 states have call successors, (431), 324 states have call predecessors, (431), 412 states have return successors, (584), 451 states have call predecessors, (584), 428 states have call successors, (584) [2022-07-21 08:07:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 5564 transitions. [2022-07-21 08:07:10,652 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 5564 transitions. Word has length 124 [2022-07-21 08:07:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:10,652 INFO L495 AbstractCegarLoop]: Abstraction has 4347 states and 5564 transitions. [2022-07-21 08:07:10,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 5564 transitions. [2022-07-21 08:07:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:10,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:10,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:10,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 08:07:10,657 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 114605925, now seen corresponding path program 1 times [2022-07-21 08:07:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:10,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016114154] [2022-07-21 08:07:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:10,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:10,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:10,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:10,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:10,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:10,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:10,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:10,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016114154] [2022-07-21 08:07:10,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016114154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:10,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:10,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:10,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735846492] [2022-07-21 08:07:10,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:10,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:10,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:10,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:10,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:10,753 INFO L87 Difference]: Start difference. First operand 4347 states and 5564 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:12,824 INFO L93 Difference]: Finished difference Result 7228 states and 10115 transitions. [2022-07-21 08:07:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:07:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:12,841 INFO L225 Difference]: With dead ends: 7228 [2022-07-21 08:07:12,841 INFO L226 Difference]: Without dead ends: 6030 [2022-07-21 08:07:12,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-21 08:07:12,849 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 1274 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:12,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 1683 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 08:07:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6030 states. [2022-07-21 08:07:13,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6030 to 5295. [2022-07-21 08:07:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5295 states, 4358 states have (on average 1.3469481413492428) internal successors, (5870), 4437 states have internal predecessors, (5870), 495 states have call successors, (495), 348 states have call predecessors, (495), 440 states have return successors, (670), 519 states have call predecessors, (670), 492 states have call successors, (670) [2022-07-21 08:07:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5295 states to 5295 states and 7035 transitions. [2022-07-21 08:07:13,250 INFO L78 Accepts]: Start accepts. Automaton has 5295 states and 7035 transitions. Word has length 124 [2022-07-21 08:07:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:13,250 INFO L495 AbstractCegarLoop]: Abstraction has 5295 states and 7035 transitions. [2022-07-21 08:07:13,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5295 states and 7035 transitions. [2022-07-21 08:07:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:13,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:13,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:13,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 08:07:13,256 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:13,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1192536473, now seen corresponding path program 1 times [2022-07-21 08:07:13,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:13,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685795423] [2022-07-21 08:07:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:13,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:13,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:13,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:13,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:13,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:13,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685795423] [2022-07-21 08:07:13,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685795423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:13,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:13,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161846901] [2022-07-21 08:07:13,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:13,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:13,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:13,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:13,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:13,388 INFO L87 Difference]: Start difference. First operand 5295 states and 7035 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:14,669 INFO L93 Difference]: Finished difference Result 8182 states and 11624 transitions. [2022-07-21 08:07:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:07:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:14,685 INFO L225 Difference]: With dead ends: 8182 [2022-07-21 08:07:14,686 INFO L226 Difference]: Without dead ends: 6036 [2022-07-21 08:07:14,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:07:14,697 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 939 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:14,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 1382 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 08:07:14,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2022-07-21 08:07:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 5295. [2022-07-21 08:07:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5295 states, 4358 states have (on average 1.3448829738412116) internal successors, (5861), 4437 states have internal predecessors, (5861), 495 states have call successors, (495), 348 states have call predecessors, (495), 440 states have return successors, (670), 519 states have call predecessors, (670), 492 states have call successors, (670) [2022-07-21 08:07:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5295 states to 5295 states and 7026 transitions. [2022-07-21 08:07:15,157 INFO L78 Accepts]: Start accepts. Automaton has 5295 states and 7026 transitions. Word has length 124 [2022-07-21 08:07:15,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:15,157 INFO L495 AbstractCegarLoop]: Abstraction has 5295 states and 7026 transitions. [2022-07-21 08:07:15,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 5295 states and 7026 transitions. [2022-07-21 08:07:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:15,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:15,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:15,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 08:07:15,162 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:15,163 INFO L85 PathProgramCache]: Analyzing trace with hash 704960293, now seen corresponding path program 1 times [2022-07-21 08:07:15,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:15,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214900501] [2022-07-21 08:07:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:15,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:15,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:15,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:15,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:15,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:15,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:15,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:15,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214900501] [2022-07-21 08:07:15,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214900501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:15,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:15,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:15,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085873862] [2022-07-21 08:07:15,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:15,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:15,269 INFO L87 Difference]: Start difference. First operand 5295 states and 7026 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:17,460 INFO L93 Difference]: Finished difference Result 10614 states and 15378 transitions. [2022-07-21 08:07:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:07:17,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:17,481 INFO L225 Difference]: With dead ends: 10614 [2022-07-21 08:07:17,482 INFO L226 Difference]: Without dead ends: 8468 [2022-07-21 08:07:17,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-21 08:07:17,491 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 1196 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:17,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 2282 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2128 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 08:07:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8468 states. [2022-07-21 08:07:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8468 to 7203. [2022-07-21 08:07:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7203 states, 6082 states have (on average 1.3987175271292338) internal successors, (8507), 6169 states have internal predecessors, (8507), 623 states have call successors, (623), 396 states have call predecessors, (623), 496 states have return successors, (860), 655 states have call predecessors, (860), 620 states have call successors, (860) [2022-07-21 08:07:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7203 states to 7203 states and 9990 transitions. [2022-07-21 08:07:17,976 INFO L78 Accepts]: Start accepts. Automaton has 7203 states and 9990 transitions. Word has length 124 [2022-07-21 08:07:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:17,977 INFO L495 AbstractCegarLoop]: Abstraction has 7203 states and 9990 transitions. [2022-07-21 08:07:17,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 7203 states and 9990 transitions. [2022-07-21 08:07:17,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:17,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:17,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:17,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 08:07:17,983 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1736001191, now seen corresponding path program 1 times [2022-07-21 08:07:17,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:17,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66240078] [2022-07-21 08:07:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:17,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:18,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:18,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:18,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:18,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:18,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:18,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66240078] [2022-07-21 08:07:18,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66240078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:18,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:18,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:18,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997293701] [2022-07-21 08:07:18,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:18,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:18,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:18,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:18,068 INFO L87 Difference]: Start difference. First operand 7203 states and 9990 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:19,682 INFO L93 Difference]: Finished difference Result 12554 states and 18475 transitions. [2022-07-21 08:07:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:07:19,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:19,701 INFO L225 Difference]: With dead ends: 12554 [2022-07-21 08:07:19,701 INFO L226 Difference]: Without dead ends: 8500 [2022-07-21 08:07:19,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:07:19,715 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 936 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:19,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 1373 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 08:07:19,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8500 states. [2022-07-21 08:07:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8500 to 7203. [2022-07-21 08:07:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7203 states, 6082 states have (on average 1.3959223939493588) internal successors, (8490), 6169 states have internal predecessors, (8490), 623 states have call successors, (623), 396 states have call predecessors, (623), 496 states have return successors, (860), 655 states have call predecessors, (860), 620 states have call successors, (860) [2022-07-21 08:07:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7203 states to 7203 states and 9973 transitions. [2022-07-21 08:07:20,149 INFO L78 Accepts]: Start accepts. Automaton has 7203 states and 9973 transitions. Word has length 124 [2022-07-21 08:07:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:20,149 INFO L495 AbstractCegarLoop]: Abstraction has 7203 states and 9973 transitions. [2022-07-21 08:07:20,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7203 states and 9973 transitions. [2022-07-21 08:07:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:20,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:20,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:20,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 08:07:20,162 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash -170402075, now seen corresponding path program 1 times [2022-07-21 08:07:20,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:20,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142190158] [2022-07-21 08:07:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:20,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:20,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:20,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:20,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:20,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:20,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:20,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142190158] [2022-07-21 08:07:20,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142190158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:20,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:20,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:20,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239729170] [2022-07-21 08:07:20,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:20,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:20,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:20,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:20,261 INFO L87 Difference]: Start difference. First operand 7203 states and 9973 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:23,135 INFO L93 Difference]: Finished difference Result 18906 states and 28242 transitions. [2022-07-21 08:07:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:07:23,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:23,182 INFO L225 Difference]: With dead ends: 18906 [2022-07-21 08:07:23,183 INFO L226 Difference]: Without dead ends: 14852 [2022-07-21 08:07:23,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:07:23,199 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 1439 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:23,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1471 Valid, 2257 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2093 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 08:07:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14852 states. [2022-07-21 08:07:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14852 to 10841. [2022-07-21 08:07:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10841 states, 9368 states have (on average 1.4391545687446627) internal successors, (13482), 9471 states have internal predecessors, (13482), 863 states have call successors, (863), 492 states have call predecessors, (863), 608 states have return successors, (1278), 911 states have call predecessors, (1278), 860 states have call successors, (1278) [2022-07-21 08:07:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10841 states to 10841 states and 15623 transitions. [2022-07-21 08:07:23,932 INFO L78 Accepts]: Start accepts. Automaton has 10841 states and 15623 transitions. Word has length 124 [2022-07-21 08:07:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:23,932 INFO L495 AbstractCegarLoop]: Abstraction has 10841 states and 15623 transitions. [2022-07-21 08:07:23,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 10841 states and 15623 transitions. [2022-07-21 08:07:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:23,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:23,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:23,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 08:07:23,941 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1430669031, now seen corresponding path program 1 times [2022-07-21 08:07:23,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:23,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196495150] [2022-07-21 08:07:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:23,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:23,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:23,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:24,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:24,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:24,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:24,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:24,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196495150] [2022-07-21 08:07:24,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196495150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:24,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:24,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:24,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903510248] [2022-07-21 08:07:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:24,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:24,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:24,039 INFO L87 Difference]: Start difference. First operand 10841 states and 15623 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:28,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:28,020 INFO L93 Difference]: Finished difference Result 32966 states and 50254 transitions. [2022-07-21 08:07:28,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:07:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:28,115 INFO L225 Difference]: With dead ends: 32966 [2022-07-21 08:07:28,116 INFO L226 Difference]: Without dead ends: 25274 [2022-07-21 08:07:28,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:07:28,145 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 1240 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:28,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 2348 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-21 08:07:28,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25274 states. [2022-07-21 08:07:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25274 to 18258. [2022-07-21 08:07:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18258 states, 16097 states have (on average 1.4762999316642853) internal successors, (23764), 16232 states have internal predecessors, (23764), 1327 states have call successors, (1327), 684 states have call predecessors, (1327), 832 states have return successors, (2260), 1407 states have call predecessors, (2260), 1324 states have call successors, (2260) [2022-07-21 08:07:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18258 states to 18258 states and 27351 transitions. [2022-07-21 08:07:29,570 INFO L78 Accepts]: Start accepts. Automaton has 18258 states and 27351 transitions. Word has length 124 [2022-07-21 08:07:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:29,571 INFO L495 AbstractCegarLoop]: Abstraction has 18258 states and 27351 transitions. [2022-07-21 08:07:29,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 18258 states and 27351 transitions. [2022-07-21 08:07:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:29,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:29,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 08:07:29,583 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash 373937829, now seen corresponding path program 1 times [2022-07-21 08:07:29,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:29,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50833563] [2022-07-21 08:07:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:29,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:29,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:29,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:29,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:29,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:29,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:29,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:29,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50833563] [2022-07-21 08:07:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50833563] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:29,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:29,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917937966] [2022-07-21 08:07:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:29,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:29,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:29,672 INFO L87 Difference]: Start difference. First operand 18258 states and 27351 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:32,119 INFO L93 Difference]: Finished difference Result 37794 states and 58728 transitions. [2022-07-21 08:07:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:07:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:32,176 INFO L225 Difference]: With dead ends: 37794 [2022-07-21 08:07:32,177 INFO L226 Difference]: Without dead ends: 22685 [2022-07-21 08:07:32,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:07:32,207 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 938 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:32,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 1361 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 08:07:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22685 states. [2022-07-21 08:07:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22685 to 18258. [2022-07-21 08:07:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18258 states, 16097 states have (on average 1.4722619121575449) internal successors, (23699), 16232 states have internal predecessors, (23699), 1327 states have call successors, (1327), 684 states have call predecessors, (1327), 832 states have return successors, (2260), 1407 states have call predecessors, (2260), 1324 states have call successors, (2260) [2022-07-21 08:07:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18258 states to 18258 states and 27286 transitions. [2022-07-21 08:07:33,594 INFO L78 Accepts]: Start accepts. Automaton has 18258 states and 27286 transitions. Word has length 124 [2022-07-21 08:07:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:33,594 INFO L495 AbstractCegarLoop]: Abstraction has 18258 states and 27286 transitions. [2022-07-21 08:07:33,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 18258 states and 27286 transitions. [2022-07-21 08:07:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:33,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:33,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:33,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-21 08:07:33,607 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1725323047, now seen corresponding path program 1 times [2022-07-21 08:07:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:33,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486706716] [2022-07-21 08:07:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:33,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:33,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:33,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:33,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:33,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:33,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:33,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:33,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486706716] [2022-07-21 08:07:33,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486706716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:33,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:33,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:33,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318895354] [2022-07-21 08:07:33,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:33,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:33,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:33,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:33,709 INFO L87 Difference]: Start difference. First operand 18258 states and 27286 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:38,879 INFO L93 Difference]: Finished difference Result 59017 states and 91664 transitions. [2022-07-21 08:07:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:07:38,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:38,980 INFO L225 Difference]: With dead ends: 59017 [2022-07-21 08:07:38,981 INFO L226 Difference]: Without dead ends: 43908 [2022-07-21 08:07:39,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:07:39,016 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 1255 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:39,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1278 Valid, 1695 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 08:07:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43908 states. [2022-07-21 08:07:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43908 to 33189. [2022-07-21 08:07:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33189 states, 29684 states have (on average 1.4965974935992454) internal successors, (44425), 29883 states have internal predecessors, (44425), 2223 states have call successors, (2223), 1068 states have call predecessors, (2223), 1280 states have return successors, (4678), 2367 states have call predecessors, (4678), 2220 states have call successors, (4678) [2022-07-21 08:07:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33189 states to 33189 states and 51326 transitions. [2022-07-21 08:07:41,770 INFO L78 Accepts]: Start accepts. Automaton has 33189 states and 51326 transitions. Word has length 124 [2022-07-21 08:07:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:41,771 INFO L495 AbstractCegarLoop]: Abstraction has 33189 states and 51326 transitions. [2022-07-21 08:07:41,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 33189 states and 51326 transitions. [2022-07-21 08:07:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:41,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:41,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:41,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 08:07:41,792 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash 841814057, now seen corresponding path program 1 times [2022-07-21 08:07:41,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:41,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107781026] [2022-07-21 08:07:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:41,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:41,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:41,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:41,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:41,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:41,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:41,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:41,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107781026] [2022-07-21 08:07:41,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107781026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:41,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:41,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:41,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346937583] [2022-07-21 08:07:41,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:41,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:41,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:41,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:41,883 INFO L87 Difference]: Start difference. First operand 33189 states and 51326 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:07:50,601 INFO L93 Difference]: Finished difference Result 111994 states and 177898 transitions. [2022-07-21 08:07:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:07:50,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:07:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:07:50,849 INFO L225 Difference]: With dead ends: 111994 [2022-07-21 08:07:50,849 INFO L226 Difference]: Without dead ends: 81954 [2022-07-21 08:07:50,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:07:50,926 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 1234 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 08:07:50,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1266 Valid, 2234 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 08:07:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81954 states. [2022-07-21 08:07:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81954 to 62982. [2022-07-21 08:07:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62982 states, 56853 states have (on average 1.5114593776933496) internal successors, (85931), 57180 states have internal predecessors, (85931), 3951 states have call successors, (3951), 1836 states have call predecessors, (3951), 2176 states have return successors, (10908), 4223 states have call predecessors, (10908), 3948 states have call successors, (10908) [2022-07-21 08:07:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62982 states to 62982 states and 100790 transitions. [2022-07-21 08:07:55,633 INFO L78 Accepts]: Start accepts. Automaton has 62982 states and 100790 transitions. Word has length 124 [2022-07-21 08:07:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:07:55,633 INFO L495 AbstractCegarLoop]: Abstraction has 62982 states and 100790 transitions. [2022-07-21 08:07:55,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:07:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 62982 states and 100790 transitions. [2022-07-21 08:07:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 08:07:55,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:07:55,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:07:55,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 08:07:55,669 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:07:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:07:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash 813313767, now seen corresponding path program 1 times [2022-07-21 08:07:55,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:07:55,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953525049] [2022-07-21 08:07:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:07:55,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:07:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:55,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:07:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 08:07:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:55,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 08:07:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:55,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 08:07:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:55,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 08:07:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:07:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:07:55,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:07:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953525049] [2022-07-21 08:07:55,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953525049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:07:55,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:07:55,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:07:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607679323] [2022-07-21 08:07:55,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:07:55,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:07:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:07:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:07:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:07:55,785 INFO L87 Difference]: Start difference. First operand 62982 states and 100790 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2022-07-21 08:08:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:08:11,313 INFO L93 Difference]: Finished difference Result 215577 states and 352416 transitions. [2022-07-21 08:08:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:08:11,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2022-07-21 08:08:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:08:11,929 INFO L225 Difference]: With dead ends: 215577 [2022-07-21 08:08:11,930 INFO L226 Difference]: Without dead ends: 155744 [2022-07-21 08:08:12,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:08:12,078 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 1179 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 08:08:12,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1202 Valid, 2242 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-21 08:08:12,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155744 states.