./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_1.cil-2+token_ring.14.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:09:17,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:09:17,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:09:17,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:09:17,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:09:17,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:09:17,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:09:17,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:09:17,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:09:17,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:09:17,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:09:17,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:09:17,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:09:17,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:09:17,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:09:17,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:09:17,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:09:17,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:09:17,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:09:17,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:09:17,736 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:09:17,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:09:17,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:09:17,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:09:17,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:09:17,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:09:17,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:09:17,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:09:17,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:09:17,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:09:17,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:09:17,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:09:17,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:09:17,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:09:17,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:09:17,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:09:17,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:09:17,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:09:17,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:09:17,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:09:17,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:09:17,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:09:17,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:09:17,776 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:09:17,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:09:17,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:09:17,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:09:17,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:09:17,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:09:17,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:09:17,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:09:17,779 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:09:17,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:09:17,779 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:09:17,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:09:17,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:09:17,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:09:17,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:09:17,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:09:17,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:09:17,780 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:09:17,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:09:17,781 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:09:17,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:09:17,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:09:17,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:09:17,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:09:17,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:09:17,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:09:17,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:09:17,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:09:17,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:09:17,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:09:17,783 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:09:17,783 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:09:17,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:09:17,784 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce [2022-07-13 21:09:17,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:09:17,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:09:17,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:09:17,961 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:09:17,961 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:09:17,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2022-07-13 21:09:18,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a55b8ff17/51186c615d6d456081e83400e1cb87dc/FLAG9fa519afc [2022-07-13 21:09:18,350 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:09:18,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2022-07-13 21:09:18,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a55b8ff17/51186c615d6d456081e83400e1cb87dc/FLAG9fa519afc [2022-07-13 21:09:18,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a55b8ff17/51186c615d6d456081e83400e1cb87dc [2022-07-13 21:09:18,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:09:18,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:09:18,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:09:18,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:09:18,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:09:18,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:09:18" (1/1) ... [2022-07-13 21:09:18,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c022b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:18, skipping insertion in model container [2022-07-13 21:09:18,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:09:18" (1/1) ... [2022-07-13 21:09:18,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:09:18,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:09:18,943 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_1.cil-2+token_ring.14.cil.c[913,926] [2022-07-13 21:09:18,968 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_1.cil-2+token_ring.14.cil.c[5977,5990] [2022-07-13 21:09:19,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:09:19,036 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:09:19,043 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_1.cil-2+token_ring.14.cil.c[913,926] [2022-07-13 21:09:19,053 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_1.cil-2+token_ring.14.cil.c[5977,5990] [2022-07-13 21:09:19,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:09:19,128 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:09:19,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19 WrapperNode [2022-07-13 21:09:19,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:09:19,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:09:19,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:09:19,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:09:19,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,182 INFO L137 Inliner]: procedures = 72, calls = 85, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1058 [2022-07-13 21:09:19,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:09:19,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:09:19,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:09:19,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:09:19,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:09:19,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:09:19,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:09:19,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:09:19,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (1/1) ... [2022-07-13 21:09:19,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:09:19,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:09:19,293 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) [2022-07-13 21:09:19,314 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 [2022-07-13 21:09:19,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:09:19,320 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-13 21:09:19,321 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-13 21:09:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-13 21:09:19,321 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-13 21:09:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-13 21:09:19,321 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-13 21:09:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-13 21:09:19,321 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-13 21:09:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-13 21:09:19,322 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-13 21:09:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-13 21:09:19,322 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-13 21:09:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-13 21:09:19,322 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-13 21:09:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:09:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-13 21:09:19,322 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-13 21:09:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:09:19,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:09:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-13 21:09:19,323 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-13 21:09:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-13 21:09:19,323 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-13 21:09:19,458 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:09:19,460 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:09:20,085 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:09:20,097 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:09:20,097 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2022-07-13 21:09:20,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:09:20 BoogieIcfgContainer [2022-07-13 21:09:20,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:09:20,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:09:20,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:09:20,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:09:20,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:09:18" (1/3) ... [2022-07-13 21:09:20,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a89d2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:09:20, skipping insertion in model container [2022-07-13 21:09:20,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:09:19" (2/3) ... [2022-07-13 21:09:20,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a89d2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:09:20, skipping insertion in model container [2022-07-13 21:09:20,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:09:20" (3/3) ... [2022-07-13 21:09:20,107 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.14.cil.c [2022-07-13 21:09:20,117 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:09:20,117 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:09:20,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:09:20,156 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@19940ba4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2964537b [2022-07-13 21:09:20,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:09:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-13 21:09:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 21:09:20,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:20,173 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] [2022-07-13 21:09:20,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2140149972, now seen corresponding path program 1 times [2022-07-13 21:09:20,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:20,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543248016] [2022-07-13 21:09:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:20,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:09:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 21:09:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:20,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:20,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543248016] [2022-07-13 21:09:20,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543248016] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:20,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:20,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:09:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37267503] [2022-07-13 21:09:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:20,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:09:20,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:09:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:09:20,452 INFO L87 Difference]: Start difference. First operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:09:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:20,707 INFO L93 Difference]: Finished difference Result 964 states and 1568 transitions. [2022-07-13 21:09:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:09:20,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-13 21:09:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:20,718 INFO L225 Difference]: With dead ends: 964 [2022-07-13 21:09:20,718 INFO L226 Difference]: Without dead ends: 519 [2022-07-13 21:09:20,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:09:20,724 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 953 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:20,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1133 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:09:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-07-13 21:09:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2022-07-13 21:09:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 462 states have (on average 1.5346320346320346) internal successors, (709), 467 states have internal predecessors, (709), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2022-07-13 21:09:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 787 transitions. [2022-07-13 21:09:20,800 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 787 transitions. Word has length 44 [2022-07-13 21:09:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:20,801 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 787 transitions. [2022-07-13 21:09:20,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:09:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 787 transitions. [2022-07-13 21:09:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 21:09:20,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:20,806 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] [2022-07-13 21:09:20,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:09:20,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:20,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1297015323, now seen corresponding path program 1 times [2022-07-13 21:09:20,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:20,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196302430] [2022-07-13 21:09:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:20,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:09:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 21:09:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:20,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196302430] [2022-07-13 21:09:20,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196302430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:20,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:20,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:09:20,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996829328] [2022-07-13 21:09:20,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:20,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:09:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:09:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:09:20,872 INFO L87 Difference]: Start difference. First operand 513 states and 787 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:09:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:21,312 INFO L93 Difference]: Finished difference Result 761 states and 1127 transitions. [2022-07-13 21:09:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:09:21,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-13 21:09:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:21,318 INFO L225 Difference]: With dead ends: 761 [2022-07-13 21:09:21,318 INFO L226 Difference]: Without dead ends: 637 [2022-07-13 21:09:21,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:09:21,319 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 369 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:21,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1468 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:09:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-07-13 21:09:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 580. [2022-07-13 21:09:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 523 states have (on average 1.5162523900573615) internal successors, (793), 528 states have internal predecessors, (793), 41 states have call successors, (41), 15 states have call predecessors, (41), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-13 21:09:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 877 transitions. [2022-07-13 21:09:21,338 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 877 transitions. Word has length 45 [2022-07-13 21:09:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:21,338 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 877 transitions. [2022-07-13 21:09:21,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:09:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 877 transitions. [2022-07-13 21:09:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 21:09:21,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:21,339 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] [2022-07-13 21:09:21,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:09:21,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:21,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1713594512, now seen corresponding path program 1 times [2022-07-13 21:09:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:21,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165508013] [2022-07-13 21:09:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:21,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:09:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:21,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 21:09:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:21,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:21,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165508013] [2022-07-13 21:09:21,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165508013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:21,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:21,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:09:21,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093148546] [2022-07-13 21:09:21,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:21,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:09:21,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:21,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:09:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:09:21,375 INFO L87 Difference]: Start difference. First operand 580 states and 877 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:09:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:21,518 INFO L93 Difference]: Finished difference Result 988 states and 1436 transitions. [2022-07-13 21:09:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:09:21,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-13 21:09:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:21,522 INFO L225 Difference]: With dead ends: 988 [2022-07-13 21:09:21,522 INFO L226 Difference]: Without dead ends: 797 [2022-07-13 21:09:21,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:09:21,527 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 962 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:21,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1135 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:09:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-07-13 21:09:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 745. [2022-07-13 21:09:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 669 states have (on average 1.4693572496263079) internal successors, (983), 677 states have internal predecessors, (983), 52 states have call successors, (52), 22 states have call predecessors, (52), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2022-07-13 21:09:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1095 transitions. [2022-07-13 21:09:21,548 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1095 transitions. Word has length 45 [2022-07-13 21:09:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:21,549 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1095 transitions. [2022-07-13 21:09:21,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:09:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1095 transitions. [2022-07-13 21:09:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 21:09:21,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:21,551 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] [2022-07-13 21:09:21,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:09:21,555 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1877488540, now seen corresponding path program 1 times [2022-07-13 21:09:21,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:21,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108064777] [2022-07-13 21:09:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:21,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:09:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:21,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:09:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:21,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 21:09:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:09:21,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:21,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108064777] [2022-07-13 21:09:21,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108064777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:21,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:21,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:09:21,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703624223] [2022-07-13 21:09:21,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:21,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:09:21,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:21,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:09:21,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:09:21,630 INFO L87 Difference]: Start difference. First operand 745 states and 1095 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:09:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:21,995 INFO L93 Difference]: Finished difference Result 1329 states and 1880 transitions. [2022-07-13 21:09:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:09:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-07-13 21:09:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:21,999 INFO L225 Difference]: With dead ends: 1329 [2022-07-13 21:09:21,999 INFO L226 Difference]: Without dead ends: 973 [2022-07-13 21:09:22,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:09:22,001 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 353 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:22,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1523 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 21:09:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-07-13 21:09:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 935. [2022-07-13 21:09:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 835 states have (on average 1.4167664670658682) internal successors, (1183), 845 states have internal predecessors, (1183), 66 states have call successors, (66), 30 states have call predecessors, (66), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2022-07-13 21:09:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1333 transitions. [2022-07-13 21:09:22,027 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1333 transitions. Word has length 62 [2022-07-13 21:09:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:22,027 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 1333 transitions. [2022-07-13 21:09:22,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:09:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1333 transitions. [2022-07-13 21:09:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 21:09:22,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:22,029 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] [2022-07-13 21:09:22,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:09:22,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1022869652, now seen corresponding path program 1 times [2022-07-13 21:09:22,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:22,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633456817] [2022-07-13 21:09:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:22,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:22,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:09:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:22,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 21:09:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:22,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-13 21:09:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 21:09:22,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:22,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633456817] [2022-07-13 21:09:22,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633456817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:22,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:22,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:09:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560737350] [2022-07-13 21:09:22,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:22,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:09:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:09:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:09:22,100 INFO L87 Difference]: Start difference. First operand 935 states and 1333 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 21:09:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:22,251 INFO L93 Difference]: Finished difference Result 1588 states and 2186 transitions. [2022-07-13 21:09:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:09:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-07-13 21:09:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:22,256 INFO L225 Difference]: With dead ends: 1588 [2022-07-13 21:09:22,256 INFO L226 Difference]: Without dead ends: 1134 [2022-07-13 21:09:22,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:09:22,258 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 949 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:22,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 1132 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:09:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-07-13 21:09:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1079. [2022-07-13 21:09:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 963 states have (on average 1.3852544132917965) internal successors, (1334), 975 states have internal predecessors, (1334), 74 states have call successors, (74), 36 states have call predecessors, (74), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2022-07-13 21:09:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1506 transitions. [2022-07-13 21:09:22,293 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1506 transitions. Word has length 67 [2022-07-13 21:09:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:22,294 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1506 transitions. [2022-07-13 21:09:22,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 21:09:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1506 transitions. [2022-07-13 21:09:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 21:09:22,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:22,296 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 21:09:22,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:09:22,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash 604966393, now seen corresponding path program 1 times [2022-07-13 21:09:22,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:22,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684185712] [2022-07-13 21:09:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:22,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:22,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:09:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:22,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:09:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:22,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 21:09:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:09:22,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:22,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684185712] [2022-07-13 21:09:22,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684185712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:09:22,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346686023] [2022-07-13 21:09:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:22,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:09:22,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:09:22,355 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) [2022-07-13 21:09:22,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:09:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:22,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 21:09:22,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:09:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:22,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:09:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:09:22,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346686023] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 21:09:22,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 21:09:22,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-13 21:09:22,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445051207] [2022-07-13 21:09:22,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:22,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:09:22,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:22,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:09:22,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:09:22,588 INFO L87 Difference]: Start difference. First operand 1079 states and 1506 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:09:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:22,712 INFO L93 Difference]: Finished difference Result 1135 states and 1574 transitions. [2022-07-13 21:09:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:09:22,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-07-13 21:09:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:22,716 INFO L225 Difference]: With dead ends: 1135 [2022-07-13 21:09:22,716 INFO L226 Difference]: Without dead ends: 1132 [2022-07-13 21:09:22,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:09:22,717 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 1271 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:22,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1271 Valid, 788 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:09:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-07-13 21:09:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1078. [2022-07-13 21:09:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 963 states have (on average 1.3831775700934579) internal successors, (1332), 974 states have internal predecessors, (1332), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2022-07-13 21:09:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1503 transitions. [2022-07-13 21:09:22,767 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1503 transitions. Word has length 68 [2022-07-13 21:09:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:22,767 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 1503 transitions. [2022-07-13 21:09:22,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:09:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1503 transitions. [2022-07-13 21:09:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 21:09:22,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:22,769 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 21:09:22,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:09:22,983 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,SelfDestructingSolverStorable5 [2022-07-13 21:09:22,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:22,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1572679607, now seen corresponding path program 1 times [2022-07-13 21:09:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:22,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401168380] [2022-07-13 21:09:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:22,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:23,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:09:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:23,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:09:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:23,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 21:09:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:09:23,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401168380] [2022-07-13 21:09:23,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401168380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:09:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641279512] [2022-07-13 21:09:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:23,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:09:23,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:09:23,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:09:23,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:09:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:09:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:09:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:23,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:09:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:09:23,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641279512] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:09:23,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:09:23,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-13 21:09:23,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207727140] [2022-07-13 21:09:23,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:09:23,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 21:09:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 21:09:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:09:23,394 INFO L87 Difference]: Start difference. First operand 1078 states and 1503 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 21:09:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:24,572 INFO L93 Difference]: Finished difference Result 2778 states and 3723 transitions. [2022-07-13 21:09:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 21:09:24,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-07-13 21:09:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:24,580 INFO L225 Difference]: With dead ends: 2778 [2022-07-13 21:09:24,580 INFO L226 Difference]: Without dead ends: 2234 [2022-07-13 21:09:24,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 21:09:24,596 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 1316 mSDsluCounter, 3063 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 3889 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:24,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 3889 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 21:09:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2022-07-13 21:09:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1467. [2022-07-13 21:09:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1313 states have (on average 1.345011424219345) internal successors, (1766), 1332 states have internal predecessors, (1766), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2022-07-13 21:09:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1991 transitions. [2022-07-13 21:09:24,661 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1991 transitions. Word has length 69 [2022-07-13 21:09:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:24,661 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 1991 transitions. [2022-07-13 21:09:24,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 21:09:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1991 transitions. [2022-07-13 21:09:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-13 21:09:24,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:24,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 21:09:24,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:09:24,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-13 21:09:24,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 498798882, now seen corresponding path program 1 times [2022-07-13 21:09:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:24,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914174898] [2022-07-13 21:09:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:24,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:24,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:09:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:24,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:09:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:24,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 21:09:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:24,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 21:09:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 21:09:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:24,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914174898] [2022-07-13 21:09:24,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914174898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:09:24,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343530017] [2022-07-13 21:09:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:24,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:09:24,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:09:24,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:09:24,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:09:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 21:09:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:09:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:09:25,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:09:25,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343530017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:25,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:09:25,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 21:09:25,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469175046] [2022-07-13 21:09:25,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:25,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:09:25,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:25,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:09:25,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:25,077 INFO L87 Difference]: Start difference. First operand 1467 states and 1991 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 21:09:25,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:25,125 INFO L93 Difference]: Finished difference Result 2190 states and 2929 transitions. [2022-07-13 21:09:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:09:25,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-07-13 21:09:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:25,131 INFO L225 Difference]: With dead ends: 2190 [2022-07-13 21:09:25,131 INFO L226 Difference]: Without dead ends: 1345 [2022-07-13 21:09:25,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:25,135 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 656 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:25,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 802 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:09:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-07-13 21:09:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1330. [2022-07-13 21:09:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1192 states have (on average 1.348993288590604) internal successors, (1608), 1210 states have internal predecessors, (1608), 85 states have call successors, (85), 44 states have call predecessors, (85), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2022-07-13 21:09:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1811 transitions. [2022-07-13 21:09:25,193 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1811 transitions. Word has length 88 [2022-07-13 21:09:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:25,194 INFO L495 AbstractCegarLoop]: Abstraction has 1330 states and 1811 transitions. [2022-07-13 21:09:25,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 21:09:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1811 transitions. [2022-07-13 21:09:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 21:09:25,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:25,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:25,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:09:25,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:09:25,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:25,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1813831709, now seen corresponding path program 1 times [2022-07-13 21:09:25,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:25,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621839849] [2022-07-13 21:09:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:25,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:09:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:09:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:09:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 21:09:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 21:09:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 21:09:25,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:25,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621839849] [2022-07-13 21:09:25,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621839849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:09:25,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612387955] [2022-07-13 21:09:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:25,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:09:25,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:09:25,475 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:09:25,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:09:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:09:25,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:09:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 21:09:25,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:09:25,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612387955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:25,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:09:25,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 21:09:25,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203423970] [2022-07-13 21:09:25,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:25,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:09:25,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:25,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:09:25,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:25,591 INFO L87 Difference]: Start difference. First operand 1330 states and 1811 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 21:09:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:25,623 INFO L93 Difference]: Finished difference Result 1709 states and 2279 transitions. [2022-07-13 21:09:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:09:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-07-13 21:09:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:25,625 INFO L225 Difference]: With dead ends: 1709 [2022-07-13 21:09:25,626 INFO L226 Difference]: Without dead ends: 383 [2022-07-13 21:09:25,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:25,628 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 62 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:25,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1412 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:09:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-13 21:09:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-07-13 21:09:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5804597701149425) internal successors, (550), 350 states have internal predecessors, (550), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-13 21:09:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 604 transitions. [2022-07-13 21:09:25,637 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 604 transitions. Word has length 103 [2022-07-13 21:09:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:25,637 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 604 transitions. [2022-07-13 21:09:25,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 21:09:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 604 transitions. [2022-07-13 21:09:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:25,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:25,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:25,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:09:25,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:09:25,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash -659936082, now seen corresponding path program 1 times [2022-07-13 21:09:25,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:25,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237192742] [2022-07-13 21:09:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:25,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:25,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237192742] [2022-07-13 21:09:25,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237192742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:25,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:25,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:09:25,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395212665] [2022-07-13 21:09:25,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:25,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:09:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:25,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:09:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:09:25,964 INFO L87 Difference]: Start difference. First operand 383 states and 604 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-07-13 21:09:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:27,085 INFO L93 Difference]: Finished difference Result 901 states and 1444 transitions. [2022-07-13 21:09:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:09:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:27,088 INFO L225 Difference]: With dead ends: 901 [2022-07-13 21:09:27,088 INFO L226 Difference]: Without dead ends: 525 [2022-07-13 21:09:27,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:09:27,089 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 1042 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:27,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1066 Valid, 1065 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:09:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-13 21:09:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2022-07-13 21:09:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5775862068965518) internal successors, (549), 350 states have internal predecessors, (549), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-13 21:09:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 603 transitions. [2022-07-13 21:09:27,105 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 603 transitions. Word has length 179 [2022-07-13 21:09:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:27,106 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 603 transitions. [2022-07-13 21:09:27,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-07-13 21:09:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 603 transitions. [2022-07-13 21:09:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:27,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:27,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:27,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:09:27,108 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1308528852, now seen corresponding path program 1 times [2022-07-13 21:09:27,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:27,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355520107] [2022-07-13 21:09:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:27,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:27,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:27,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:27,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:27,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:27,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:27,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:27,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355520107] [2022-07-13 21:09:27,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355520107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:27,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:27,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:09:27,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196337560] [2022-07-13 21:09:27,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:27,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:09:27,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:27,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:09:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:09:27,201 INFO L87 Difference]: Start difference. First operand 383 states and 603 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-07-13 21:09:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:28,263 INFO L93 Difference]: Finished difference Result 893 states and 1427 transitions. [2022-07-13 21:09:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:09:28,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:28,266 INFO L225 Difference]: With dead ends: 893 [2022-07-13 21:09:28,266 INFO L226 Difference]: Without dead ends: 525 [2022-07-13 21:09:28,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:09:28,268 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 1033 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:28,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 1063 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:09:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-13 21:09:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2022-07-13 21:09:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5747126436781609) internal successors, (548), 350 states have internal predecessors, (548), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-13 21:09:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 602 transitions. [2022-07-13 21:09:28,288 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 602 transitions. Word has length 179 [2022-07-13 21:09:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:28,288 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 602 transitions. [2022-07-13 21:09:28,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-07-13 21:09:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 602 transitions. [2022-07-13 21:09:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:28,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:28,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:28,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:09:28,290 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1807085654, now seen corresponding path program 1 times [2022-07-13 21:09:28,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:28,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362086652] [2022-07-13 21:09:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:28,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:28,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:28,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:28,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:28,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:28,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:28,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362086652] [2022-07-13 21:09:28,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362086652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:28,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:28,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:09:28,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953660954] [2022-07-13 21:09:28,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:28,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:09:28,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:28,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:09:28,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:09:28,407 INFO L87 Difference]: Start difference. First operand 383 states and 602 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2022-07-13 21:09:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:30,633 INFO L93 Difference]: Finished difference Result 1409 states and 2265 transitions. [2022-07-13 21:09:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:09:30,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:30,637 INFO L225 Difference]: With dead ends: 1409 [2022-07-13 21:09:30,637 INFO L226 Difference]: Without dead ends: 1047 [2022-07-13 21:09:30,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:09:30,638 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 1564 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:30,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 1683 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 21:09:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-07-13 21:09:30,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 762. [2022-07-13 21:09:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 699 states have (on average 1.5879828326180256) internal successors, (1110), 702 states have internal predecessors, (1110), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2022-07-13 21:09:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1209 transitions. [2022-07-13 21:09:30,673 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1209 transitions. Word has length 179 [2022-07-13 21:09:30,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:30,673 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 1209 transitions. [2022-07-13 21:09:30,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2022-07-13 21:09:30,673 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1209 transitions. [2022-07-13 21:09:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:30,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:30,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:30,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:09:30,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash -826130840, now seen corresponding path program 1 times [2022-07-13 21:09:30,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:30,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608012465] [2022-07-13 21:09:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:30,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:30,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:30,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:30,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:30,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:30,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608012465] [2022-07-13 21:09:30,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608012465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:30,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:30,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356698343] [2022-07-13 21:09:30,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:30,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:30,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:30,822 INFO L87 Difference]: Start difference. First operand 762 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:33,601 INFO L93 Difference]: Finished difference Result 2328 states and 3751 transitions. [2022-07-13 21:09:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:09:33,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:33,606 INFO L225 Difference]: With dead ends: 2328 [2022-07-13 21:09:33,606 INFO L226 Difference]: Without dead ends: 1587 [2022-07-13 21:09:33,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:09:33,608 INFO L413 NwaCegarLoop]: 1025 mSDtfsCounter, 1591 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 3223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:33,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 2945 Invalid, 3223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3144 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 21:09:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-07-13 21:09:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1114. [2022-07-13 21:09:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1023 states have (on average 1.5816226783968719) internal successors, (1618), 1027 states have internal predecessors, (1618), 70 states have call successors, (70), 19 states have call predecessors, (70), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2022-07-13 21:09:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1761 transitions. [2022-07-13 21:09:33,662 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1761 transitions. Word has length 179 [2022-07-13 21:09:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:33,662 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1761 transitions. [2022-07-13 21:09:33,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1761 transitions. [2022-07-13 21:09:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:33,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:33,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:33,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:09:33,664 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1699364842, now seen corresponding path program 1 times [2022-07-13 21:09:33,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:33,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491418069] [2022-07-13 21:09:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:33,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:33,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:33,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:33,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:33,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:33,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:33,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491418069] [2022-07-13 21:09:33,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491418069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:33,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:33,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:33,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65504286] [2022-07-13 21:09:33,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:33,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:33,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:33,767 INFO L87 Difference]: Start difference. First operand 1114 states and 1761 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:36,467 INFO L93 Difference]: Finished difference Result 3683 states and 5923 transitions. [2022-07-13 21:09:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:09:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:36,476 INFO L225 Difference]: With dead ends: 3683 [2022-07-13 21:09:36,476 INFO L226 Difference]: Without dead ends: 2590 [2022-07-13 21:09:36,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:09:36,479 INFO L413 NwaCegarLoop]: 1017 mSDtfsCounter, 1588 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 3146 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 3228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:36,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1607 Valid, 2937 Invalid, 3228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3146 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 21:09:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-07-13 21:09:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 1819. [2022-07-13 21:09:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.575956937799043) internal successors, (2635), 1678 states have internal predecessors, (2635), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2022-07-13 21:09:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2870 transitions. [2022-07-13 21:09:36,578 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2870 transitions. Word has length 179 [2022-07-13 21:09:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:36,579 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 2870 transitions. [2022-07-13 21:09:36,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2870 transitions. [2022-07-13 21:09:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:36,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:36,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:36,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:09:36,581 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1088095784, now seen corresponding path program 1 times [2022-07-13 21:09:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116107041] [2022-07-13 21:09:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:36,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:36,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:36,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:36,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:36,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:36,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116107041] [2022-07-13 21:09:36,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116107041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:36,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:36,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:36,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499336906] [2022-07-13 21:09:36,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:36,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:36,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:36,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:36,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:36,715 INFO L87 Difference]: Start difference. First operand 1819 states and 2870 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:38,037 INFO L93 Difference]: Finished difference Result 4376 states and 7023 transitions. [2022-07-13 21:09:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:09:38,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:38,047 INFO L225 Difference]: With dead ends: 4376 [2022-07-13 21:09:38,047 INFO L226 Difference]: Without dead ends: 2578 [2022-07-13 21:09:38,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:09:38,052 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 1295 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:38,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1315 Valid, 1406 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 21:09:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-07-13 21:09:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1819. [2022-07-13 21:09:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.5729665071770336) internal successors, (2630), 1678 states have internal predecessors, (2630), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2022-07-13 21:09:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2865 transitions. [2022-07-13 21:09:38,184 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2865 transitions. Word has length 179 [2022-07-13 21:09:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:38,185 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 2865 transitions. [2022-07-13 21:09:38,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2865 transitions. [2022-07-13 21:09:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:38,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:38,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:38,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:09:38,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:38,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:38,189 INFO L85 PathProgramCache]: Analyzing trace with hash -317095894, now seen corresponding path program 1 times [2022-07-13 21:09:38,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:38,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181335280] [2022-07-13 21:09:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:38,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:38,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:38,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:38,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:38,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:38,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:38,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:38,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181335280] [2022-07-13 21:09:38,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181335280] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:38,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:38,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:38,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753441526] [2022-07-13 21:09:38,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:38,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:38,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:38,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:38,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:38,311 INFO L87 Difference]: Start difference. First operand 1819 states and 2865 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:39,609 INFO L93 Difference]: Finished difference Result 4370 states and 6997 transitions. [2022-07-13 21:09:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:09:39,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:39,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:39,616 INFO L225 Difference]: With dead ends: 4370 [2022-07-13 21:09:39,616 INFO L226 Difference]: Without dead ends: 2572 [2022-07-13 21:09:39,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:09:39,621 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 1296 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:39,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1316 Valid, 1400 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 21:09:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-07-13 21:09:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1819. [2022-07-13 21:09:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.569976076555024) internal successors, (2625), 1678 states have internal predecessors, (2625), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2022-07-13 21:09:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2860 transitions. [2022-07-13 21:09:39,741 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2860 transitions. Word has length 179 [2022-07-13 21:09:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:39,742 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 2860 transitions. [2022-07-13 21:09:39,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2860 transitions. [2022-07-13 21:09:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:39,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:39,744 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:09:39,744 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1577237992, now seen corresponding path program 1 times [2022-07-13 21:09:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:39,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880562683] [2022-07-13 21:09:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:39,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:39,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:39,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:39,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:39,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:39,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:39,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880562683] [2022-07-13 21:09:39,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880562683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:39,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:39,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:39,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105443578] [2022-07-13 21:09:39,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:39,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:39,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:39,880 INFO L87 Difference]: Start difference. First operand 1819 states and 2860 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:41,373 INFO L93 Difference]: Finished difference Result 4358 states and 6959 transitions. [2022-07-13 21:09:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:09:41,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:41,380 INFO L225 Difference]: With dead ends: 4358 [2022-07-13 21:09:41,380 INFO L226 Difference]: Without dead ends: 2560 [2022-07-13 21:09:41,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:09:41,384 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 1125 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:41,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 1593 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 21:09:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-07-13 21:09:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1819. [2022-07-13 21:09:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.5669856459330143) internal successors, (2620), 1678 states have internal predecessors, (2620), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2022-07-13 21:09:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2855 transitions. [2022-07-13 21:09:41,529 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2855 transitions. Word has length 179 [2022-07-13 21:09:41,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:41,529 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 2855 transitions. [2022-07-13 21:09:41,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2855 transitions. [2022-07-13 21:09:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:41,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:41,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:41,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 21:09:41,531 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:41,532 INFO L85 PathProgramCache]: Analyzing trace with hash 654070566, now seen corresponding path program 1 times [2022-07-13 21:09:41,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:41,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543616084] [2022-07-13 21:09:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:41,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:41,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:41,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:41,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:41,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:41,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:41,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543616084] [2022-07-13 21:09:41,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543616084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:41,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:41,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:41,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152595289] [2022-07-13 21:09:41,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:41,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:41,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:41,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:41,630 INFO L87 Difference]: Start difference. First operand 1819 states and 2855 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:44,413 INFO L93 Difference]: Finished difference Result 6263 states and 9956 transitions. [2022-07-13 21:09:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:09:44,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:44,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:44,424 INFO L225 Difference]: With dead ends: 6263 [2022-07-13 21:09:44,425 INFO L226 Difference]: Without dead ends: 4465 [2022-07-13 21:09:44,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:09:44,429 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 1563 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:44,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 2909 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 21:09:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2022-07-13 21:09:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 3248. [2022-07-13 21:09:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2989 states have (on average 1.5617263298762127) internal successors, (4668), 2999 states have internal predecessors, (4668), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2022-07-13 21:09:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 5093 transitions. [2022-07-13 21:09:44,679 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 5093 transitions. Word has length 179 [2022-07-13 21:09:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:44,679 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 5093 transitions. [2022-07-13 21:09:44,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 5093 transitions. [2022-07-13 21:09:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:44,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:44,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:44,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:09:44,682 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1039932968, now seen corresponding path program 1 times [2022-07-13 21:09:44,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:44,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543188681] [2022-07-13 21:09:44,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:44,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:44,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:44,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:44,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:44,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:44,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:44,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:44,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543188681] [2022-07-13 21:09:44,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543188681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:44,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:44,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:44,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937391218] [2022-07-13 21:09:44,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:44,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:44,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:44,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:44,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:44,783 INFO L87 Difference]: Start difference. First operand 3248 states and 5093 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:46,259 INFO L93 Difference]: Finished difference Result 7712 states and 12262 transitions. [2022-07-13 21:09:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:09:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:46,285 INFO L225 Difference]: With dead ends: 7712 [2022-07-13 21:09:46,285 INFO L226 Difference]: Without dead ends: 4485 [2022-07-13 21:09:46,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:09:46,291 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 1361 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:46,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1381 Valid, 1351 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:09:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2022-07-13 21:09:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3248. [2022-07-13 21:09:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2989 states have (on average 1.5587152893944463) internal successors, (4659), 2999 states have internal predecessors, (4659), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2022-07-13 21:09:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 5084 transitions. [2022-07-13 21:09:46,555 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 5084 transitions. Word has length 179 [2022-07-13 21:09:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:46,555 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 5084 transitions. [2022-07-13 21:09:46,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 5084 transitions. [2022-07-13 21:09:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:46,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:46,557 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:46,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 21:09:46,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash 775285478, now seen corresponding path program 1 times [2022-07-13 21:09:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:46,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301667745] [2022-07-13 21:09:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:46,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:46,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:46,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:46,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:46,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:46,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301667745] [2022-07-13 21:09:46,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301667745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:46,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:46,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:46,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565553169] [2022-07-13 21:09:46,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:46,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:46,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:46,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:46,668 INFO L87 Difference]: Start difference. First operand 3248 states and 5084 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:49,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:49,881 INFO L93 Difference]: Finished difference Result 11464 states and 18144 transitions. [2022-07-13 21:09:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:09:49,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:49,901 INFO L225 Difference]: With dead ends: 11464 [2022-07-13 21:09:49,901 INFO L226 Difference]: Without dead ends: 8237 [2022-07-13 21:09:49,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:09:49,908 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 1555 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 2898 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:49,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1574 Valid, 2898 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3041 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 21:09:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8237 states. [2022-07-13 21:09:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8237 to 6114. [2022-07-13 21:09:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 5631 states have (on average 1.554075652637187) internal successors, (8751), 5649 states have internal predecessors, (8751), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2022-07-13 21:09:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9574 transitions. [2022-07-13 21:09:50,401 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9574 transitions. Word has length 179 [2022-07-13 21:09:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:50,401 INFO L495 AbstractCegarLoop]: Abstraction has 6114 states and 9574 transitions. [2022-07-13 21:09:50,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9574 transitions. [2022-07-13 21:09:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:50,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:50,404 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:50,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 21:09:50,405 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1588556184, now seen corresponding path program 1 times [2022-07-13 21:09:50,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:50,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554307110] [2022-07-13 21:09:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:50,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:50,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:50,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:50,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:50,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:50,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:50,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:50,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554307110] [2022-07-13 21:09:50,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554307110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:50,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:50,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:50,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070118379] [2022-07-13 21:09:50,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:50,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:50,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:50,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:50,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:50,528 INFO L87 Difference]: Start difference. First operand 6114 states and 9574 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:52,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:52,606 INFO L93 Difference]: Finished difference Result 14408 states and 22861 transitions. [2022-07-13 21:09:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:09:52,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:52,624 INFO L225 Difference]: With dead ends: 14408 [2022-07-13 21:09:52,624 INFO L226 Difference]: Without dead ends: 8315 [2022-07-13 21:09:52,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:09:52,637 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 1123 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:52,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 1579 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 21:09:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2022-07-13 21:09:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 6114. [2022-07-13 21:09:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 5631 states have (on average 1.5510566506837151) internal successors, (8734), 5649 states have internal predecessors, (8734), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2022-07-13 21:09:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9557 transitions. [2022-07-13 21:09:53,195 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9557 transitions. Word has length 179 [2022-07-13 21:09:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:53,195 INFO L495 AbstractCegarLoop]: Abstraction has 6114 states and 9557 transitions. [2022-07-13 21:09:53,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9557 transitions. [2022-07-13 21:09:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:53,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:53,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:53,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 21:09:53,199 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:53,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1383232166, now seen corresponding path program 1 times [2022-07-13 21:09:53,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:53,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982511392] [2022-07-13 21:09:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:53,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:53,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:53,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:53,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:53,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:53,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:53,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:53,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982511392] [2022-07-13 21:09:53,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982511392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:53,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:53,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:53,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659025960] [2022-07-13 21:09:53,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:53,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:53,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:53,304 INFO L87 Difference]: Start difference. First operand 6114 states and 9557 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:55,555 INFO L93 Difference]: Finished difference Result 14390 states and 22774 transitions. [2022-07-13 21:09:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:09:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:09:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:55,572 INFO L225 Difference]: With dead ends: 14390 [2022-07-13 21:09:55,573 INFO L226 Difference]: Without dead ends: 8297 [2022-07-13 21:09:55,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:09:55,582 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1121 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:55,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1141 Valid, 1575 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 21:09:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2022-07-13 21:09:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 6114. [2022-07-13 21:09:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 5631 states have (on average 1.5480376487302432) internal successors, (8717), 5649 states have internal predecessors, (8717), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2022-07-13 21:09:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9540 transitions. [2022-07-13 21:09:56,134 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9540 transitions. Word has length 179 [2022-07-13 21:09:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:56,135 INFO L495 AbstractCegarLoop]: Abstraction has 6114 states and 9540 transitions. [2022-07-13 21:09:56,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:09:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9540 transitions. [2022-07-13 21:09:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:09:56,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:56,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:09:56,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 21:09:56,138 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:56,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1014755672, now seen corresponding path program 1 times [2022-07-13 21:09:56,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:56,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651145718] [2022-07-13 21:09:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:56,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:56,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:56,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:09:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:56,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:09:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:56,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:09:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:56,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:09:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:09:56,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651145718] [2022-07-13 21:09:56,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651145718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:56,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:56,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:56,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10050222] [2022-07-13 21:09:56,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:56,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:56,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:56,264 INFO L87 Difference]: Start difference. First operand 6114 states and 9540 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:10:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:10:00,554 INFO L93 Difference]: Finished difference Result 21844 states and 34408 transitions. [2022-07-13 21:10:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:10:00,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:10:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:10:00,594 INFO L225 Difference]: With dead ends: 21844 [2022-07-13 21:10:00,594 INFO L226 Difference]: Without dead ends: 15751 [2022-07-13 21:10:00,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:10:00,607 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 1543 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 2992 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:10:00,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1562 Valid, 2879 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2992 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 21:10:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15751 states. [2022-07-13 21:10:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15751 to 11893. [2022-07-13 21:10:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11893 states, 10962 states have (on average 1.5437876299945266) internal successors, (16923), 10996 states have internal predecessors, (16923), 700 states have call successors, (700), 199 states have call predecessors, (700), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2022-07-13 21:10:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11893 states to 11893 states and 18596 transitions. [2022-07-13 21:10:01,776 INFO L78 Accepts]: Start accepts. Automaton has 11893 states and 18596 transitions. Word has length 179 [2022-07-13 21:10:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:10:01,776 INFO L495 AbstractCegarLoop]: Abstraction has 11893 states and 18596 transitions. [2022-07-13 21:10:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:10:01,776 INFO L276 IsEmpty]: Start isEmpty. Operand 11893 states and 18596 transitions. [2022-07-13 21:10:01,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:10:01,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:10:01,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:10:01,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 21:10:01,796 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:10:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:10:01,796 INFO L85 PathProgramCache]: Analyzing trace with hash -676468122, now seen corresponding path program 1 times [2022-07-13 21:10:01,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:10:01,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203701749] [2022-07-13 21:10:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:10:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:10:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:01,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:10:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:01,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:10:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:01,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:10:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:01,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:10:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:01,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:10:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:10:01,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:10:01,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203701749] [2022-07-13 21:10:01,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203701749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:10:01,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:10:01,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:10:01,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479967624] [2022-07-13 21:10:01,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:10:01,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:10:01,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:10:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:10:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:10:01,973 INFO L87 Difference]: Start difference. First operand 11893 states and 18596 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:10:10,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:10:10,327 INFO L93 Difference]: Finished difference Result 47923 states and 75512 transitions. [2022-07-13 21:10:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:10:10,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:10:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:10:10,404 INFO L225 Difference]: With dead ends: 47923 [2022-07-13 21:10:10,405 INFO L226 Difference]: Without dead ends: 36051 [2022-07-13 21:10:10,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:10:10,429 INFO L413 NwaCegarLoop]: 1135 mSDtfsCounter, 1650 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 3515 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 3044 SdHoareTripleChecker+Invalid, 3606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 21:10:10,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1668 Valid, 3044 Invalid, 3606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3515 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 21:10:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36051 states. [2022-07-13 21:10:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36051 to 23159. [2022-07-13 21:10:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23159 states, 21364 states have (on average 1.5412375959558136) internal successors, (32927), 21430 states have internal predecessors, (32927), 1340 states have call successors, (1340), 391 states have call predecessors, (1340), 454 states have return successors, (2131), 1401 states have call predecessors, (2131), 1338 states have call successors, (2131) [2022-07-13 21:10:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23159 states to 23159 states and 36398 transitions. [2022-07-13 21:10:12,877 INFO L78 Accepts]: Start accepts. Automaton has 23159 states and 36398 transitions. Word has length 179 [2022-07-13 21:10:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:10:12,877 INFO L495 AbstractCegarLoop]: Abstraction has 23159 states and 36398 transitions. [2022-07-13 21:10:12,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:10:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 23159 states and 36398 transitions. [2022-07-13 21:10:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:10:12,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:10:12,885 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:10:12,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 21:10:12,885 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:10:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:10:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1216897628, now seen corresponding path program 1 times [2022-07-13 21:10:12,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:10:12,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049296217] [2022-07-13 21:10:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:10:12,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:10:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:12,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:10:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:12,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:10:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:12,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:10:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:12,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:10:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:12,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:10:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:10:12,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:10:12,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049296217] [2022-07-13 21:10:12,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049296217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:10:12,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:10:12,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:10:12,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274180886] [2022-07-13 21:10:12,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:10:12,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:10:12,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:10:12,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:10:12,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:10:12,984 INFO L87 Difference]: Start difference. First operand 23159 states and 36398 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:10:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:10:26,383 INFO L93 Difference]: Finished difference Result 92979 states and 147216 transitions. [2022-07-13 21:10:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:10:26,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:10:26,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:10:26,558 INFO L225 Difference]: With dead ends: 92979 [2022-07-13 21:10:26,558 INFO L226 Difference]: Without dead ends: 69841 [2022-07-13 21:10:26,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:10:26,615 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 1945 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 2959 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1977 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 21:10:26,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1977 Valid, 2855 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2959 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 21:10:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69841 states. [2022-07-13 21:10:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69841 to 45912. [2022-07-13 21:10:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45912 states, 42421 states have (on average 1.5419014167511373) internal successors, (65409), 42551 states have internal predecessors, (65409), 2588 states have call successors, (2588), 775 states have call predecessors, (2588), 902 states have return successors, (4901), 2713 states have call predecessors, (4901), 2586 states have call successors, (4901) [2022-07-13 21:10:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45912 states to 45912 states and 72898 transitions. [2022-07-13 21:10:31,734 INFO L78 Accepts]: Start accepts. Automaton has 45912 states and 72898 transitions. Word has length 179 [2022-07-13 21:10:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:10:31,734 INFO L495 AbstractCegarLoop]: Abstraction has 45912 states and 72898 transitions. [2022-07-13 21:10:31,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:10:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 45912 states and 72898 transitions. [2022-07-13 21:10:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:10:31,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:10:31,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:10:31,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 21:10:31,748 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:10:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:10:31,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1372878170, now seen corresponding path program 1 times [2022-07-13 21:10:31,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:10:31,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294878247] [2022-07-13 21:10:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:10:31,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:10:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:31,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:10:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:31,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:10:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:31,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:10:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:31,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:10:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:31,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:10:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:10:31,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:10:31,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294878247] [2022-07-13 21:10:31,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294878247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:10:31,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:10:31,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:10:31,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283766096] [2022-07-13 21:10:31,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:10:31,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:10:31,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:10:31,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:10:31,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:10:31,852 INFO L87 Difference]: Start difference. First operand 45912 states and 72898 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:10:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:10:56,527 INFO L93 Difference]: Finished difference Result 182610 states and 291958 transitions. [2022-07-13 21:10:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:10:56,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:10:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:10:56,935 INFO L225 Difference]: With dead ends: 182610 [2022-07-13 21:10:56,936 INFO L226 Difference]: Without dead ends: 136719 [2022-07-13 21:10:57,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:10:57,062 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 1718 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 2124 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:10:57,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1736 Valid, 2124 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3136 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 21:10:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136719 states. [2022-07-13 21:11:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136719 to 91353. [2022-07-13 21:11:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91353 states, 84534 states have (on average 1.542988619963565) internal successors, (130435), 84792 states have internal predecessors, (130435), 5020 states have call successors, (5020), 1543 states have call predecessors, (5020), 1798 states have return successors, (11835), 5273 states have call predecessors, (11835), 5018 states have call successors, (11835) [2022-07-13 21:11:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91353 states to 91353 states and 147290 transitions. [2022-07-13 21:11:07,475 INFO L78 Accepts]: Start accepts. Automaton has 91353 states and 147290 transitions. Word has length 179 [2022-07-13 21:11:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:11:07,475 INFO L495 AbstractCegarLoop]: Abstraction has 91353 states and 147290 transitions. [2022-07-13 21:11:07,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:11:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 91353 states and 147290 transitions. [2022-07-13 21:11:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 21:11:07,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:11:07,502 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:11:07,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 21:11:07,502 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:11:07,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:11:07,503 INFO L85 PathProgramCache]: Analyzing trace with hash -962267804, now seen corresponding path program 1 times [2022-07-13 21:11:07,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:11:07,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231584982] [2022-07-13 21:11:07,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:11:07,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:11:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:11:07,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:11:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:11:07,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 21:11:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:11:07,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:11:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:11:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:11:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:11:07,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-13 21:11:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:11:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:11:07,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:11:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231584982] [2022-07-13 21:11:07,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231584982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:11:07,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:11:07,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:11:07,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030671280] [2022-07-13 21:11:07,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:11:07,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:11:07,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:11:07,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:11:07,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:11:07,813 INFO L87 Difference]: Start difference. First operand 91353 states and 147290 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2022-07-13 21:11:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:11:55,383 INFO L93 Difference]: Finished difference Result 359505 states and 583500 transitions. [2022-07-13 21:11:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:11:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-13 21:11:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:11:56,380 INFO L225 Difference]: With dead ends: 359505 [2022-07-13 21:11:56,380 INFO L226 Difference]: Without dead ends: 268173 [2022-07-13 21:11:56,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:11:56,707 INFO L413 NwaCegarLoop]: 933 mSDtfsCounter, 1865 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1897 SdHoareTripleChecker+Valid, 2845 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:11:56,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1897 Valid, 2845 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2943 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 21:11:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268173 states.