./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:02:14,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:02:14,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:02:14,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:02:14,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:02:14,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:02:14,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:02:14,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:02:14,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:02:14,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:02:14,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:02:14,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:02:14,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:02:14,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:02:14,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:02:14,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:02:14,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:02:14,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:02:14,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:02:14,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:02:14,699 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:02:14,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:02:14,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:02:14,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:02:14,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:02:14,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:02:14,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:02:14,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:02:14,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:02:14,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:02:14,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:02:14,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:02:14,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:02:14,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:02:14,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:02:14,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:02:14,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:02:14,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:02:14,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:02:14,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:02:14,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:02:14,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:02:14,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:02:14,757 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:02:14,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:02:14,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:02:14,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:02:14,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:02:14,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:02:14,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:02:14,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:02:14,760 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:02:14,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:02:14,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:02:14,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:02:14,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:02:14,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:02:14,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:02:14,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:02:14,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:02:14,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:02:14,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:02:14,763 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:02:14,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:02:14,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:02:14,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:02:14,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:02:14,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:02:14,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:02:14,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:02:14,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:02:14,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:02:14,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:02:14,766 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:02:14,766 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:02:14,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:02:14,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be [2022-07-21 08:02:15,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:02:15,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:02:15,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:02:15,048 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:02:15,048 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:02:15,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-07-21 08:02:15,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7be4116/bec73abbc4fd494487ef73152431637b/FLAG96880c77a [2022-07-21 08:02:15,530 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:02:15,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-07-21 08:02:15,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7be4116/bec73abbc4fd494487ef73152431637b/FLAG96880c77a [2022-07-21 08:02:15,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7be4116/bec73abbc4fd494487ef73152431637b [2022-07-21 08:02:15,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:02:15,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:02:15,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:02:15,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:02:15,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:02:15,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:15,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742e876f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15, skipping insertion in model container [2022-07-21 08:02:15,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:15,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:02:15,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:02:15,731 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.04.cil-2.c[913,926] [2022-07-21 08:02:15,790 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.04.cil-2.c[5977,5990] [2022-07-21 08:02:15,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:02:15,831 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:02:15,840 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.04.cil-2.c[913,926] [2022-07-21 08:02:15,856 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.04.cil-2.c[5977,5990] [2022-07-21 08:02:15,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:02:15,910 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:02:15,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15 WrapperNode [2022-07-21 08:02:15,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:02:15,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:02:15,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:02:15,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:02:15,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:15,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:15,961 INFO L137 Inliner]: procedures = 56, calls = 61, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 596 [2022-07-21 08:02:15,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:02:15,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:02:15,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:02:15,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:02:15,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:15,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:15,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:15,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:15,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:16,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:16,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:16,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:02:16,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:02:16,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:02:16,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:02:16,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (1/1) ... [2022-07-21 08:02:16,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:02:16,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:16,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:02:16,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:02:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:02:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-21 08:02:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-21 08:02:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-21 08:02:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-21 08:02:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-21 08:02:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-21 08:02:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-21 08:02:16,076 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-21 08:02:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-21 08:02:16,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-21 08:02:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-21 08:02:16,076 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-21 08:02:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-21 08:02:16,076 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-21 08:02:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:02:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-21 08:02:16,077 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-21 08:02:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:02:16,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:02:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-21 08:02:16,077 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-21 08:02:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-21 08:02:16,077 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-21 08:02:16,157 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:02:16,168 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:02:16,683 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:02:16,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:02:16,692 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-21 08:02:16,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:02:16 BoogieIcfgContainer [2022-07-21 08:02:16,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:02:16,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:02:16,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:02:16,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:02:16,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:02:15" (1/3) ... [2022-07-21 08:02:16,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1802b946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:02:16, skipping insertion in model container [2022-07-21 08:02:16,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:02:15" (2/3) ... [2022-07-21 08:02:16,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1802b946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:02:16, skipping insertion in model container [2022-07-21 08:02:16,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:02:16" (3/3) ... [2022-07-21 08:02:16,704 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-07-21 08:02:16,714 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:02:16,714 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 08:02:16,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:02:16,783 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@7aac9339, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@38fbc846 [2022-07-21 08:02:16,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:02:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-21 08:02:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 08:02:16,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:16,798 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] [2022-07-21 08:02:16,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash -994911012, now seen corresponding path program 1 times [2022-07-21 08:02:16,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:16,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857155314] [2022-07-21 08:02:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:16,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:17,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:17,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 08:02:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:17,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857155314] [2022-07-21 08:02:17,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857155314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:17,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:17,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:02:17,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289533739] [2022-07-21 08:02:17,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:17,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:02:17,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:17,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:02:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:02:17,106 INFO L87 Difference]: Start difference. First operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) 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) [2022-07-21 08:02:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:17,372 INFO L93 Difference]: Finished difference Result 576 states and 904 transitions. [2022-07-21 08:02:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:02:17,375 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 [2022-07-21 08:02:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:17,393 INFO L225 Difference]: With dead ends: 576 [2022-07-21 08:02:17,393 INFO L226 Difference]: Without dead ends: 321 [2022-07-21 08:02:17,400 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 [2022-07-21 08:02:17,404 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 477 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:17,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 669 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 08:02:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-21 08:02:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 315. [2022-07-21 08:02:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 272 states have (on average 1.474264705882353) internal successors, (401), 277 states have internal predecessors, (401), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (32), 26 states have call predecessors, (32), 26 states have call successors, (32) [2022-07-21 08:02:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 463 transitions. [2022-07-21 08:02:17,484 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 463 transitions. Word has length 44 [2022-07-21 08:02:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:17,485 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 463 transitions. [2022-07-21 08:02:17,485 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) [2022-07-21 08:02:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 463 transitions. [2022-07-21 08:02:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 08:02:17,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:17,490 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] [2022-07-21 08:02:17,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:02:17,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash -983625859, now seen corresponding path program 1 times [2022-07-21 08:02:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331443139] [2022-07-21 08:02:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:17,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:17,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:17,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 08:02:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:17,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331443139] [2022-07-21 08:02:17,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331443139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:17,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:17,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:02:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669753138] [2022-07-21 08:02:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:17,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:02:17,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:02:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:02:17,557 INFO L87 Difference]: Start difference. First operand 315 states and 463 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) [2022-07-21 08:02:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:17,787 INFO L93 Difference]: Finished difference Result 563 states and 803 transitions. [2022-07-21 08:02:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:02:17,788 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 [2022-07-21 08:02:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:17,791 INFO L225 Difference]: With dead ends: 563 [2022-07-21 08:02:17,791 INFO L226 Difference]: Without dead ends: 439 [2022-07-21 08:02:17,792 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 [2022-07-21 08:02:17,793 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 209 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:17,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 840 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 08:02:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-21 08:02:17,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 382. [2022-07-21 08:02:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 333 states have (on average 1.4564564564564564) internal successors, (485), 338 states have internal predecessors, (485), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2022-07-21 08:02:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 553 transitions. [2022-07-21 08:02:17,821 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 553 transitions. Word has length 45 [2022-07-21 08:02:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:17,821 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 553 transitions. [2022-07-21 08:02:17,822 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) [2022-07-21 08:02:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 553 transitions. [2022-07-21 08:02:17,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 08:02:17,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:17,823 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] [2022-07-21 08:02:17,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:02:17,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:17,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2026983976, now seen corresponding path program 1 times [2022-07-21 08:02:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:17,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992445163] [2022-07-21 08:02:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:17,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:17,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:17,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 08:02:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:17,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:17,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992445163] [2022-07-21 08:02:17,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992445163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:17,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:17,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:02:17,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649409512] [2022-07-21 08:02:17,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:17,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:02:17,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:17,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:02:17,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:02:17,872 INFO L87 Difference]: Start difference. First operand 382 states and 553 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) [2022-07-21 08:02:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:18,033 INFO L93 Difference]: Finished difference Result 790 states and 1112 transitions. [2022-07-21 08:02:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:02:18,034 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 [2022-07-21 08:02:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:18,037 INFO L225 Difference]: With dead ends: 790 [2022-07-21 08:02:18,037 INFO L226 Difference]: Without dead ends: 599 [2022-07-21 08:02:18,038 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 [2022-07-21 08:02:18,038 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 486 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:18,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 663 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 08:02:18,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-07-21 08:02:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 547. [2022-07-21 08:02:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 479 states have (on average 1.4091858037578289) internal successors, (675), 487 states have internal predecessors, (675), 44 states have call successors, (44), 22 states have call predecessors, (44), 22 states have return successors, (52), 38 states have call predecessors, (52), 40 states have call successors, (52) [2022-07-21 08:02:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 771 transitions. [2022-07-21 08:02:18,060 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 771 transitions. Word has length 45 [2022-07-21 08:02:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:18,060 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 771 transitions. [2022-07-21 08:02:18,060 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) [2022-07-21 08:02:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 771 transitions. [2022-07-21 08:02:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 08:02:18,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:18,062 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] [2022-07-21 08:02:18,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:02:18,067 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:18,069 INFO L85 PathProgramCache]: Analyzing trace with hash -89185588, now seen corresponding path program 1 times [2022-07-21 08:02:18,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:18,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299374705] [2022-07-21 08:02:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:18,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 08:02:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:02:18,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:18,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299374705] [2022-07-21 08:02:18,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299374705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:18,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:18,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:02:18,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258077872] [2022-07-21 08:02:18,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:18,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:02:18,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:02:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:02:18,139 INFO L87 Difference]: Start difference. First operand 547 states and 771 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) [2022-07-21 08:02:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:18,366 INFO L93 Difference]: Finished difference Result 1131 states and 1556 transitions. [2022-07-21 08:02:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:02:18,366 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 [2022-07-21 08:02:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:18,370 INFO L225 Difference]: With dead ends: 1131 [2022-07-21 08:02:18,370 INFO L226 Difference]: Without dead ends: 775 [2022-07-21 08:02:18,371 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 [2022-07-21 08:02:18,372 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 193 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:18,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 895 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 08:02:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-07-21 08:02:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 737. [2022-07-21 08:02:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 645 states have (on average 1.3565891472868217) internal successors, (875), 655 states have internal predecessors, (875), 58 states have call successors, (58), 30 states have call predecessors, (58), 32 states have return successors, (76), 52 states have call predecessors, (76), 54 states have call successors, (76) [2022-07-21 08:02:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1009 transitions. [2022-07-21 08:02:18,402 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1009 transitions. Word has length 62 [2022-07-21 08:02:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:18,404 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1009 transitions. [2022-07-21 08:02:18,404 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) [2022-07-21 08:02:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1009 transitions. [2022-07-21 08:02:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 08:02:18,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:18,410 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] [2022-07-21 08:02:18,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:02:18,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash 613039140, now seen corresponding path program 1 times [2022-07-21 08:02:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:18,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603671991] [2022-07-21 08:02:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:18,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 08:02:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-21 08:02:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 08:02:18,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603671991] [2022-07-21 08:02:18,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603671991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:18,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:18,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:02:18,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096947667] [2022-07-21 08:02:18,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:18,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:02:18,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:02:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:02:18,501 INFO L87 Difference]: Start difference. First operand 737 states and 1009 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) [2022-07-21 08:02:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:18,633 INFO L93 Difference]: Finished difference Result 1390 states and 1862 transitions. [2022-07-21 08:02:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:02:18,633 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 [2022-07-21 08:02:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:18,638 INFO L225 Difference]: With dead ends: 1390 [2022-07-21 08:02:18,638 INFO L226 Difference]: Without dead ends: 936 [2022-07-21 08:02:18,640 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 [2022-07-21 08:02:18,644 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 473 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:18,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 660 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 08:02:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-07-21 08:02:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 881. [2022-07-21 08:02:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 773 states have (on average 1.3272962483829236) internal successors, (1026), 785 states have internal predecessors, (1026), 66 states have call successors, (66), 36 states have call predecessors, (66), 40 states have return successors, (90), 60 states have call predecessors, (90), 62 states have call successors, (90) [2022-07-21 08:02:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1182 transitions. [2022-07-21 08:02:18,675 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1182 transitions. Word has length 67 [2022-07-21 08:02:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:18,675 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1182 transitions. [2022-07-21 08:02:18,675 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) [2022-07-21 08:02:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1182 transitions. [2022-07-21 08:02:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 08:02:18,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:18,678 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:18,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:02:18,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:18,679 INFO L85 PathProgramCache]: Analyzing trace with hash 250622658, now seen corresponding path program 1 times [2022-07-21 08:02:18,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:18,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611906314] [2022-07-21 08:02:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:18,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 08:02:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 08:02:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:02:18,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:18,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611906314] [2022-07-21 08:02:18,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611906314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:18,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167442103] [2022-07-21 08:02:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:18,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:18,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:18,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:02:18,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:02:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:18,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:02:18,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:02:18,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:02:18,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167442103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:18,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:02:18,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-21 08:02:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310109369] [2022-07-21 08:02:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:02:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:02:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:02:18,965 INFO L87 Difference]: Start difference. First operand 881 states and 1182 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:02:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:19,018 INFO L93 Difference]: Finished difference Result 1424 states and 1905 transitions. [2022-07-21 08:02:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:02:19,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-07-21 08:02:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:19,022 INFO L225 Difference]: With dead ends: 1424 [2022-07-21 08:02:19,023 INFO L226 Difference]: Without dead ends: 879 [2022-07-21 08:02:19,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:02:19,025 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 72 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:19,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 766 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:02:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-07-21 08:02:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 835. [2022-07-21 08:02:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 733 states have (on average 1.311050477489768) internal successors, (961), 745 states have internal predecessors, (961), 62 states have call successors, (62), 34 states have call predecessors, (62), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2022-07-21 08:02:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1107 transitions. [2022-07-21 08:02:19,065 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1107 transitions. Word has length 68 [2022-07-21 08:02:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:19,065 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1107 transitions. [2022-07-21 08:02:19,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:02:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1107 transitions. [2022-07-21 08:02:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 08:02:19,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:19,068 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] [2022-07-21 08:02:19,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:02:19,287 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 [2022-07-21 08:02:19,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:19,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1864372863, now seen corresponding path program 1 times [2022-07-21 08:02:19,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:19,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324711800] [2022-07-21 08:02:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:19,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:19,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:19,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 08:02:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:19,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 08:02:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:02:19,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:19,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324711800] [2022-07-21 08:02:19,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324711800] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:19,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62505478] [2022-07-21 08:02:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:19,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:19,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:19,361 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) [2022-07-21 08:02:19,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:02:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:02:19,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:19,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:02:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 08:02:19,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62505478] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:19,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:02:19,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-21 08:02:19,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337132491] [2022-07-21 08:02:19,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:19,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:02:19,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:19,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:02:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:19,539 INFO L87 Difference]: Start difference. First operand 835 states and 1107 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) [2022-07-21 08:02:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:19,655 INFO L93 Difference]: Finished difference Result 887 states and 1169 transitions. [2022-07-21 08:02:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:02:19,655 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 [2022-07-21 08:02:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:19,660 INFO L225 Difference]: With dead ends: 887 [2022-07-21 08:02:19,660 INFO L226 Difference]: Without dead ends: 884 [2022-07-21 08:02:19,661 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 [2022-07-21 08:02:19,661 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 651 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:19,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 459 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 08:02:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-21 08:02:19,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 834. [2022-07-21 08:02:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 733 states have (on average 1.3083219645293316) internal successors, (959), 744 states have internal predecessors, (959), 61 states have call successors, (61), 34 states have call predecessors, (61), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2022-07-21 08:02:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1104 transitions. [2022-07-21 08:02:19,699 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1104 transitions. Word has length 68 [2022-07-21 08:02:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:19,700 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1104 transitions. [2022-07-21 08:02:19,700 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) [2022-07-21 08:02:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1104 transitions. [2022-07-21 08:02:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-21 08:02:19,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:19,702 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] [2022-07-21 08:02:19,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:02:19,923 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 [2022-07-21 08:02:19,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1961817817, now seen corresponding path program 1 times [2022-07-21 08:02:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:19,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579312695] [2022-07-21 08:02:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:19,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:19,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:19,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 08:02:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:19,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 08:02:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:02:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579312695] [2022-07-21 08:02:19,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579312695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077199215] [2022-07-21 08:02:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:19,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:19,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:19,980 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) [2022-07-21 08:02:19,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:02:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:20,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:02:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:20,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:02:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 08:02:20,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077199215] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:02:20,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:02:20,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-21 08:02:20,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697892379] [2022-07-21 08:02:20,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:02:20,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 08:02:20,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:20,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 08:02:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:02:20,327 INFO L87 Difference]: Start difference. First operand 834 states and 1104 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) [2022-07-21 08:02:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:21,306 INFO L93 Difference]: Finished difference Result 2344 states and 3042 transitions. [2022-07-21 08:02:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 08:02:21,307 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 [2022-07-21 08:02:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:21,314 INFO L225 Difference]: With dead ends: 2344 [2022-07-21 08:02:21,314 INFO L226 Difference]: Without dead ends: 1848 [2022-07-21 08:02:21,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 08:02:21,320 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 1090 mSDsluCounter, 2038 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2533 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:21,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 2533 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 08:02:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-07-21 08:02:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1213. [2022-07-21 08:02:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1073 states have (on average 1.277726001863933) internal successors, (1371), 1092 states have internal predecessors, (1371), 81 states have call successors, (81), 48 states have call predecessors, (81), 57 states have return successors, (118), 73 states have call predecessors, (118), 78 states have call successors, (118) [2022-07-21 08:02:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1570 transitions. [2022-07-21 08:02:21,387 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1570 transitions. Word has length 69 [2022-07-21 08:02:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:21,387 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1570 transitions. [2022-07-21 08:02:21,387 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) [2022-07-21 08:02:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1570 transitions. [2022-07-21 08:02:21,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 08:02:21,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:21,391 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] [2022-07-21 08:02:21,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 08:02:21,611 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 [2022-07-21 08:02:21,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash 484677058, now seen corresponding path program 1 times [2022-07-21 08:02:21,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:21,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144007512] [2022-07-21 08:02:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:21,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:21,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 08:02:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:21,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 08:02:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:21,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-21 08:02:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 08:02:21,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:21,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144007512] [2022-07-21 08:02:21,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144007512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:21,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917875131] [2022-07-21 08:02:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:21,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:21,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:21,696 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) [2022-07-21 08:02:21,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:02:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:21,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:02:21,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 08:02:21,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:02:21,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917875131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:21,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:02:21,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-21 08:02:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658271476] [2022-07-21 08:02:21,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:02:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:02:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:02:21,811 INFO L87 Difference]: Start difference. First operand 1213 states and 1570 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) [2022-07-21 08:02:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:21,856 INFO L93 Difference]: Finished difference Result 1904 states and 2445 transitions. [2022-07-21 08:02:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:02:21,856 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 [2022-07-21 08:02:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:21,860 INFO L225 Difference]: With dead ends: 1904 [2022-07-21 08:02:21,860 INFO L226 Difference]: Without dead ends: 1135 [2022-07-21 08:02:21,862 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 [2022-07-21 08:02:21,862 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 330 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 474 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 [2022-07-21 08:02:21,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 474 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:02:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-07-21 08:02:21,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1126. [2022-07-21 08:02:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2720883534136547) internal successors, (1267), 1014 states have internal predecessors, (1267), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-21 08:02:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1454 transitions. [2022-07-21 08:02:21,938 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1454 transitions. Word has length 88 [2022-07-21 08:02:21,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:21,938 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1454 transitions. [2022-07-21 08:02:21,938 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) [2022-07-21 08:02:21,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1454 transitions. [2022-07-21 08:02:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:21,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:21,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:21,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:02:22,153 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 [2022-07-21 08:02:22,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:22,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1240141234, now seen corresponding path program 1 times [2022-07-21 08:02:22,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:22,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154002545] [2022-07-21 08:02:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:22,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:22,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:22,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154002545] [2022-07-21 08:02:22,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154002545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:22,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:22,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:02:22,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648503467] [2022-07-21 08:02:22,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:22,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:02:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:02:22,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:02:22,213 INFO L87 Difference]: Start difference. First operand 1126 states and 1454 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:22,658 INFO L93 Difference]: Finished difference Result 1354 states and 1810 transitions. [2022-07-21 08:02:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:02:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:22,663 INFO L225 Difference]: With dead ends: 1354 [2022-07-21 08:02:22,663 INFO L226 Difference]: Without dead ends: 1180 [2022-07-21 08:02:22,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:02:22,665 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 498 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:22,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 750 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 08:02:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-21 08:02:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1126. [2022-07-21 08:02:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2710843373493976) internal successors, (1266), 1014 states have internal predecessors, (1266), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-21 08:02:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1453 transitions. [2022-07-21 08:02:22,714 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1453 transitions. Word has length 91 [2022-07-21 08:02:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:22,715 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1453 transitions. [2022-07-21 08:02:22,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1453 transitions. [2022-07-21 08:02:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:22,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:22,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:22,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:02:22,718 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 999901488, now seen corresponding path program 1 times [2022-07-21 08:02:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:22,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736723053] [2022-07-21 08:02:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:22,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:22,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:22,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736723053] [2022-07-21 08:02:22,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736723053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:22,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:22,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:02:22,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86289783] [2022-07-21 08:02:22,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:22,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:02:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:02:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:02:22,792 INFO L87 Difference]: Start difference. First operand 1126 states and 1453 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:23,313 INFO L93 Difference]: Finished difference Result 1351 states and 1806 transitions. [2022-07-21 08:02:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:02:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:23,318 INFO L225 Difference]: With dead ends: 1351 [2022-07-21 08:02:23,319 INFO L226 Difference]: Without dead ends: 1179 [2022-07-21 08:02:23,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:02:23,320 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 579 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:23,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 839 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 08:02:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-07-21 08:02:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1126. [2022-07-21 08:02:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2700803212851406) internal successors, (1265), 1014 states have internal predecessors, (1265), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-21 08:02:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1452 transitions. [2022-07-21 08:02:23,399 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1452 transitions. Word has length 91 [2022-07-21 08:02:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:23,399 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1452 transitions. [2022-07-21 08:02:23,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1452 transitions. [2022-07-21 08:02:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:23,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:23,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:23,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:02:23,402 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1077435410, now seen corresponding path program 1 times [2022-07-21 08:02:23,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:23,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770373546] [2022-07-21 08:02:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:23,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:23,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:23,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:23,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:23,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:23,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:23,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770373546] [2022-07-21 08:02:23,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770373546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:23,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:23,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:02:23,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866385087] [2022-07-21 08:02:23,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:23,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:02:23,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:23,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:02:23,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:02:23,478 INFO L87 Difference]: Start difference. First operand 1126 states and 1452 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:24,022 INFO L93 Difference]: Finished difference Result 1360 states and 1821 transitions. [2022-07-21 08:02:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:02:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:24,027 INFO L225 Difference]: With dead ends: 1360 [2022-07-21 08:02:24,027 INFO L226 Difference]: Without dead ends: 1188 [2022-07-21 08:02:24,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:02:24,028 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 711 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:24,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 877 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 08:02:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-07-21 08:02:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1126. [2022-07-21 08:02:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2690763052208835) internal successors, (1264), 1014 states have internal predecessors, (1264), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-21 08:02:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1451 transitions. [2022-07-21 08:02:24,077 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1451 transitions. Word has length 91 [2022-07-21 08:02:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:24,077 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1451 transitions. [2022-07-21 08:02:24,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1451 transitions. [2022-07-21 08:02:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:24,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:24,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:24,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:02:24,080 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:24,080 INFO L85 PathProgramCache]: Analyzing trace with hash -190212564, now seen corresponding path program 1 times [2022-07-21 08:02:24,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:24,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358427681] [2022-07-21 08:02:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:24,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:24,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:24,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358427681] [2022-07-21 08:02:24,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358427681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:24,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:24,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:02:24,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137646646] [2022-07-21 08:02:24,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:24,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:02:24,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:24,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:02:24,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:02:24,139 INFO L87 Difference]: Start difference. First operand 1126 states and 1451 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:24,677 INFO L93 Difference]: Finished difference Result 1359 states and 1816 transitions. [2022-07-21 08:02:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:02:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:24,682 INFO L225 Difference]: With dead ends: 1359 [2022-07-21 08:02:24,682 INFO L226 Difference]: Without dead ends: 1187 [2022-07-21 08:02:24,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:02:24,684 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 709 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:24,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 873 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 08:02:24,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-07-21 08:02:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1126. [2022-07-21 08:02:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2680722891566265) internal successors, (1263), 1014 states have internal predecessors, (1263), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-21 08:02:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1450 transitions. [2022-07-21 08:02:24,737 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1450 transitions. Word has length 91 [2022-07-21 08:02:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:24,738 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1450 transitions. [2022-07-21 08:02:24,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1450 transitions. [2022-07-21 08:02:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:24,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:24,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:24,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:02:24,741 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:24,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2101255122, now seen corresponding path program 1 times [2022-07-21 08:02:24,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:24,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381644144] [2022-07-21 08:02:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:24,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:24,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:24,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381644144] [2022-07-21 08:02:24,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381644144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:24,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:24,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:02:24,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419482731] [2022-07-21 08:02:24,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:24,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:02:24,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:24,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:02:24,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:24,818 INFO L87 Difference]: Start difference. First operand 1126 states and 1450 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:26,098 INFO L93 Difference]: Finished difference Result 1602 states and 2197 transitions. [2022-07-21 08:02:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 08:02:26,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:26,105 INFO L225 Difference]: With dead ends: 1602 [2022-07-21 08:02:26,106 INFO L226 Difference]: Without dead ends: 1430 [2022-07-21 08:02:26,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-07-21 08:02:26,107 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 810 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:26,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 2043 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 08:02:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-07-21 08:02:26,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1314. [2022-07-21 08:02:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1160 states have (on average 1.306896551724138) internal successors, (1516), 1180 states have internal predecessors, (1516), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (133), 85 states have call predecessors, (133), 90 states have call successors, (133) [2022-07-21 08:02:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1742 transitions. [2022-07-21 08:02:26,177 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1742 transitions. Word has length 91 [2022-07-21 08:02:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:26,178 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 1742 transitions. [2022-07-21 08:02:26,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1742 transitions. [2022-07-21 08:02:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:26,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:26,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:26,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 08:02:26,181 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:26,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2024354324, now seen corresponding path program 1 times [2022-07-21 08:02:26,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:26,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520784595] [2022-07-21 08:02:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:26,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:26,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:26,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:26,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:26,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:26,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:26,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520784595] [2022-07-21 08:02:26,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520784595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:26,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:26,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:02:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462647426] [2022-07-21 08:02:26,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:26,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:02:26,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:02:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:26,272 INFO L87 Difference]: Start difference. First operand 1314 states and 1742 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:27,601 INFO L93 Difference]: Finished difference Result 2378 states and 3404 transitions. [2022-07-21 08:02:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 08:02:27,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:27,610 INFO L225 Difference]: With dead ends: 2378 [2022-07-21 08:02:27,610 INFO L226 Difference]: Without dead ends: 2020 [2022-07-21 08:02:27,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-21 08:02:27,613 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 988 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:27,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 1903 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 08:02:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-07-21 08:02:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1666. [2022-07-21 08:02:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1470 states have (on average 1.35578231292517) internal successors, (1993), 1494 states have internal predecessors, (1993), 119 states have call successors, (119), 62 states have call predecessors, (119), 75 states have return successors, (175), 113 states have call predecessors, (175), 116 states have call successors, (175) [2022-07-21 08:02:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2287 transitions. [2022-07-21 08:02:27,691 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2287 transitions. Word has length 91 [2022-07-21 08:02:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:27,691 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2287 transitions. [2022-07-21 08:02:27,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2287 transitions. [2022-07-21 08:02:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:27,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:27,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:27,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 08:02:27,695 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1303262318, now seen corresponding path program 1 times [2022-07-21 08:02:27,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:27,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862356898] [2022-07-21 08:02:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:27,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:27,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:27,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:27,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:27,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:27,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:27,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:27,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862356898] [2022-07-21 08:02:27,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862356898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:27,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:27,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:02:27,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576322646] [2022-07-21 08:02:27,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:27,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:02:27,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:27,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:02:27,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:27,764 INFO L87 Difference]: Start difference. First operand 1666 states and 2287 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:29,068 INFO L93 Difference]: Finished difference Result 3745 states and 5549 transitions. [2022-07-21 08:02:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 08:02:29,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:29,080 INFO L225 Difference]: With dead ends: 3745 [2022-07-21 08:02:29,080 INFO L226 Difference]: Without dead ends: 3035 [2022-07-21 08:02:29,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-21 08:02:29,084 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 1008 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:29,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 1748 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 08:02:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2022-07-21 08:02:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2350. [2022-07-21 08:02:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2066 states have (on average 1.40513068731849) internal successors, (2903), 2104 states have internal predecessors, (2903), 169 states have call successors, (169), 86 states have call predecessors, (169), 113 states have return successors, (281), 167 states have call predecessors, (281), 166 states have call successors, (281) [2022-07-21 08:02:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3353 transitions. [2022-07-21 08:02:29,202 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3353 transitions. Word has length 91 [2022-07-21 08:02:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:29,203 INFO L495 AbstractCegarLoop]: Abstraction has 2350 states and 3353 transitions. [2022-07-21 08:02:29,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3353 transitions. [2022-07-21 08:02:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:29,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:29,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:29,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 08:02:29,207 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1083247188, now seen corresponding path program 1 times [2022-07-21 08:02:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:29,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139502894] [2022-07-21 08:02:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:29,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:29,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:29,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:29,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:29,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:29,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:29,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:29,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139502894] [2022-07-21 08:02:29,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139502894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:29,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:29,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:02:29,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278048686] [2022-07-21 08:02:29,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:29,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:02:29,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:02:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:29,297 INFO L87 Difference]: Start difference. First operand 2350 states and 3353 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:30,542 INFO L93 Difference]: Finished difference Result 6370 states and 9715 transitions. [2022-07-21 08:02:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 08:02:30,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:30,560 INFO L225 Difference]: With dead ends: 6370 [2022-07-21 08:02:30,560 INFO L226 Difference]: Without dead ends: 4976 [2022-07-21 08:02:30,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-21 08:02:30,565 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 1095 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:30,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 1753 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 08:02:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2022-07-21 08:02:30,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3808. [2022-07-21 08:02:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3334 states have (on average 1.455608878224355) internal successors, (4853), 3418 states have internal predecessors, (4853), 265 states have call successors, (265), 134 states have call predecessors, (265), 207 states have return successors, (585), 271 states have call predecessors, (585), 262 states have call successors, (585) [2022-07-21 08:02:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5703 transitions. [2022-07-21 08:02:30,799 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5703 transitions. Word has length 91 [2022-07-21 08:02:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:30,799 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5703 transitions. [2022-07-21 08:02:30,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5703 transitions. [2022-07-21 08:02:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:30,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:30,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:30,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 08:02:30,805 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:30,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1575873362, now seen corresponding path program 1 times [2022-07-21 08:02:30,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:30,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758327795] [2022-07-21 08:02:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:30,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:30,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:30,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:30,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:30,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:30,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:30,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:30,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758327795] [2022-07-21 08:02:30,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758327795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:30,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:30,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:02:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791518052] [2022-07-21 08:02:30,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:30,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:02:30,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:02:30,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:02:30,864 INFO L87 Difference]: Start difference. First operand 3808 states and 5703 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:31,600 INFO L93 Difference]: Finished difference Result 7689 states and 12021 transitions. [2022-07-21 08:02:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:02:31,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:31,625 INFO L225 Difference]: With dead ends: 7689 [2022-07-21 08:02:31,626 INFO L226 Difference]: Without dead ends: 4835 [2022-07-21 08:02:31,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 08:02:31,635 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 612 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:31,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1005 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 08:02:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-07-21 08:02:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 3808. [2022-07-21 08:02:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3334 states have (on average 1.4505098980203959) internal successors, (4836), 3418 states have internal predecessors, (4836), 265 states have call successors, (265), 134 states have call predecessors, (265), 207 states have return successors, (585), 271 states have call predecessors, (585), 262 states have call successors, (585) [2022-07-21 08:02:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5686 transitions. [2022-07-21 08:02:31,857 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5686 transitions. Word has length 91 [2022-07-21 08:02:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:31,858 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5686 transitions. [2022-07-21 08:02:31,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5686 transitions. [2022-07-21 08:02:31,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 08:02:31,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:31,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:31,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 08:02:31,862 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash -621933204, now seen corresponding path program 1 times [2022-07-21 08:02:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:31,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463243545] [2022-07-21 08:02:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:31,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:31,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:31,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:02:31,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463243545] [2022-07-21 08:02:31,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463243545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:31,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:02:31,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:02:31,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754568332] [2022-07-21 08:02:31,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:31,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:02:31,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:31,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:02:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:02:31,931 INFO L87 Difference]: Start difference. First operand 3808 states and 5686 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:33,060 INFO L93 Difference]: Finished difference Result 9304 states and 14395 transitions. [2022-07-21 08:02:33,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:02:33,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-21 08:02:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:33,080 INFO L225 Difference]: With dead ends: 9304 [2022-07-21 08:02:33,081 INFO L226 Difference]: Without dead ends: 6452 [2022-07-21 08:02:33,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-21 08:02:33,090 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 956 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:33,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1335 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 08:02:33,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6452 states. [2022-07-21 08:02:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6452 to 5140. [2022-07-21 08:02:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5140 states, 4494 states have (on average 1.4581664441477526) internal successors, (6553), 4606 states have internal predecessors, (6553), 369 states have call successors, (369), 182 states have call predecessors, (369), 275 states have return successors, (753), 367 states have call predecessors, (753), 366 states have call successors, (753) [2022-07-21 08:02:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5140 states to 5140 states and 7675 transitions. [2022-07-21 08:02:33,405 INFO L78 Accepts]: Start accepts. Automaton has 5140 states and 7675 transitions. Word has length 91 [2022-07-21 08:02:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:33,405 INFO L495 AbstractCegarLoop]: Abstraction has 5140 states and 7675 transitions. [2022-07-21 08:02:33,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 08:02:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5140 states and 7675 transitions. [2022-07-21 08:02:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-21 08:02:33,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:33,411 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] [2022-07-21 08:02:33,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 08:02:33,411 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:33,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:33,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1212598261, now seen corresponding path program 1 times [2022-07-21 08:02:33,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:33,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523246755] [2022-07-21 08:02:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:33,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:33,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 08:02:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:33,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 08:02:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:33,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 08:02:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:33,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 08:02:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:33,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 08:02:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 08:02:33,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523246755] [2022-07-21 08:02:33,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523246755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770245192] [2022-07-21 08:02:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:33,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:33,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:33,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:02:33,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:02:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:02:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 08:02:33,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:02:33,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770245192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:33,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:02:33,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-21 08:02:33,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984190966] [2022-07-21 08:02:33,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:33,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:02:33,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:33,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:02:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:02:33,572 INFO L87 Difference]: Start difference. First operand 5140 states and 7675 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) [2022-07-21 08:02:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:33,784 INFO L93 Difference]: Finished difference Result 5517 states and 8136 transitions. [2022-07-21 08:02:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:02:33,784 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 [2022-07-21 08:02:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:33,794 INFO L225 Difference]: With dead ends: 5517 [2022-07-21 08:02:33,794 INFO L226 Difference]: Without dead ends: 4199 [2022-07-21 08:02:33,798 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 [2022-07-21 08:02:33,798 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 61 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 751 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 [2022-07-21 08:02:33,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 751 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:02:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2022-07-21 08:02:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4199. [2022-07-21 08:02:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 3656 states have (on average 1.512035010940919) internal successors, (5528), 3752 states have internal predecessors, (5528), 312 states have call successors, (312), 145 states have call predecessors, (312), 230 states have return successors, (661), 317 states have call predecessors, (661), 310 states have call successors, (661) [2022-07-21 08:02:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6501 transitions. [2022-07-21 08:02:34,001 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6501 transitions. Word has length 103 [2022-07-21 08:02:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:34,001 INFO L495 AbstractCegarLoop]: Abstraction has 4199 states and 6501 transitions. [2022-07-21 08:02:34,002 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) [2022-07-21 08:02:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6501 transitions. [2022-07-21 08:02:34,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-21 08:02:34,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:34,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:34,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:02:34,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:34,224 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:34,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash 938550496, now seen corresponding path program 1 times [2022-07-21 08:02:34,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:34,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921858780] [2022-07-21 08:02:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 08:02:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:02:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-21 08:02:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:02:34,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921858780] [2022-07-21 08:02:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921858780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897269311] [2022-07-21 08:02:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:34,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:34,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:34,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:02:34,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:02:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:34,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:02:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 08:02:34,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:02:34,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897269311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:34,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:02:34,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-21 08:02:34,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823607665] [2022-07-21 08:02:34,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:34,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:02:34,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:02:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:34,456 INFO L87 Difference]: Start difference. First operand 4199 states and 6501 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:02:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:34,805 INFO L93 Difference]: Finished difference Result 12445 states and 19391 transitions. [2022-07-21 08:02:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:02:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2022-07-21 08:02:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:34,831 INFO L225 Difference]: With dead ends: 12445 [2022-07-21 08:02:34,831 INFO L226 Difference]: Without dead ends: 8261 [2022-07-21 08:02:34,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:34,867 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 224 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:34,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:02:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8261 states. [2022-07-21 08:02:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8261 to 8209. [2022-07-21 08:02:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8209 states, 7156 states have (on average 1.5125768585802124) internal successors, (10824), 7346 states have internal predecessors, (10824), 592 states have call successors, (592), 289 states have call predecessors, (592), 460 states have return successors, (1261), 589 states have call predecessors, (1261), 590 states have call successors, (1261) [2022-07-21 08:02:35,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8209 states to 8209 states and 12677 transitions. [2022-07-21 08:02:35,353 INFO L78 Accepts]: Start accepts. Automaton has 8209 states and 12677 transitions. Word has length 147 [2022-07-21 08:02:35,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:35,353 INFO L495 AbstractCegarLoop]: Abstraction has 8209 states and 12677 transitions. [2022-07-21 08:02:35,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:02:35,353 INFO L276 IsEmpty]: Start isEmpty. Operand 8209 states and 12677 transitions. [2022-07-21 08:02:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-21 08:02:35,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:35,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:35,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:02:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:35,591 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1136564032, now seen corresponding path program 1 times [2022-07-21 08:02:35,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:35,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127468799] [2022-07-21 08:02:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:35,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 08:02:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:02:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-21 08:02:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:02:35,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:35,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127468799] [2022-07-21 08:02:35,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127468799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:35,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135181836] [2022-07-21 08:02:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:35,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:35,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:35,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:02:35,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:02:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:35,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:02:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 08:02:35,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:02:35,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135181836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:35,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:02:35,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-21 08:02:35,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244611990] [2022-07-21 08:02:35,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:35,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:02:35,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:35,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:02:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:35,851 INFO L87 Difference]: Start difference. First operand 8209 states and 12677 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:02:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:36,588 INFO L93 Difference]: Finished difference Result 24427 states and 37983 transitions. [2022-07-21 08:02:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:02:36,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2022-07-21 08:02:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:36,638 INFO L225 Difference]: With dead ends: 24427 [2022-07-21 08:02:36,638 INFO L226 Difference]: Without dead ends: 16233 [2022-07-21 08:02:36,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:36,719 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 212 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:36,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:02:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16233 states. [2022-07-21 08:02:37,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16233 to 16133. [2022-07-21 08:02:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16133 states, 14060 states have (on average 1.5112375533428164) internal successors, (21248), 14438 states have internal predecessors, (21248), 1152 states have call successors, (1152), 577 states have call predecessors, (1152), 920 states have return successors, (2461), 1133 states have call predecessors, (2461), 1150 states have call successors, (2461) [2022-07-21 08:02:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16133 states to 16133 states and 24861 transitions. [2022-07-21 08:02:37,528 INFO L78 Accepts]: Start accepts. Automaton has 16133 states and 24861 transitions. Word has length 147 [2022-07-21 08:02:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:37,528 INFO L495 AbstractCegarLoop]: Abstraction has 16133 states and 24861 transitions. [2022-07-21 08:02:37,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 08:02:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 16133 states and 24861 transitions. [2022-07-21 08:02:37,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-21 08:02:37,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:37,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:37,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 08:02:37,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:37,767 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:37,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:37,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1659927712, now seen corresponding path program 1 times [2022-07-21 08:02:37,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:37,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109397795] [2022-07-21 08:02:37,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:37,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:37,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:37,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:37,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:37,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:37,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:37,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 08:02:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:37,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:02:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:37,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-21 08:02:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:02:37,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:37,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109397795] [2022-07-21 08:02:37,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109397795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:37,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134169096] [2022-07-21 08:02:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:37,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:37,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:37,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:02:37,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 08:02:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:38,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:02:38,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 08:02:38,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:02:38,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134169096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:38,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:02:38,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-21 08:02:38,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885047325] [2022-07-21 08:02:38,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:38,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:02:38,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:02:38,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:38,074 INFO L87 Difference]: Start difference. First operand 16133 states and 24861 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 08:02:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:39,558 INFO L93 Difference]: Finished difference Result 47731 states and 74283 transitions. [2022-07-21 08:02:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:02:39,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 147 [2022-07-21 08:02:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:39,677 INFO L225 Difference]: With dead ends: 47731 [2022-07-21 08:02:39,677 INFO L226 Difference]: Without dead ends: 31615 [2022-07-21 08:02:39,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:39,719 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 229 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:39,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 782 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:02:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31615 states. [2022-07-21 08:02:41,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31615 to 31615. [2022-07-21 08:02:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31615 states, 27537 states have (on average 1.503431746377601) internal successors, (41400), 28260 states have internal predecessors, (41400), 2237 states have call successors, (2237), 1153 states have call predecessors, (2237), 1840 states have return successors, (5363), 2233 states have call predecessors, (5363), 2235 states have call successors, (5363) [2022-07-21 08:02:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31615 states to 31615 states and 49000 transitions. [2022-07-21 08:02:41,510 INFO L78 Accepts]: Start accepts. Automaton has 31615 states and 49000 transitions. Word has length 147 [2022-07-21 08:02:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:41,510 INFO L495 AbstractCegarLoop]: Abstraction has 31615 states and 49000 transitions. [2022-07-21 08:02:41,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 08:02:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 31615 states and 49000 transitions. [2022-07-21 08:02:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-21 08:02:41,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:41,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:41,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 08:02:41,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 08:02:41,809 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:41,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1981268215, now seen corresponding path program 1 times [2022-07-21 08:02:41,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:41,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785706019] [2022-07-21 08:02:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:41,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 08:02:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:02:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-21 08:02:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:02:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-07-21 08:02:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-21 08:02:41,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:41,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785706019] [2022-07-21 08:02:41,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785706019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:41,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323353715] [2022-07-21 08:02:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:41,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:41,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:41,918 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:02:41,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 08:02:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:42,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:02:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 08:02:42,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:02:42,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323353715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:42,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:02:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-21 08:02:42,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095179180] [2022-07-21 08:02:42,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:42,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:02:42,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:42,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:02:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:42,162 INFO L87 Difference]: Start difference. First operand 31615 states and 49000 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 08:02:45,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:45,206 INFO L93 Difference]: Finished difference Result 93763 states and 146572 transitions. [2022-07-21 08:02:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:02:45,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2022-07-21 08:02:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:45,432 INFO L225 Difference]: With dead ends: 93763 [2022-07-21 08:02:45,432 INFO L226 Difference]: Without dead ends: 62171 [2022-07-21 08:02:45,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:45,530 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 164 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:45,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:02:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62171 states. [2022-07-21 08:02:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62171 to 61783. [2022-07-21 08:02:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61783 states, 53881 states have (on average 1.5037582821402722) internal successors, (81024), 55324 states have internal predecessors, (81024), 4245 states have call successors, (4245), 2281 states have call predecessors, (4245), 3656 states have return successors, (10321), 4209 states have call predecessors, (10321), 4243 states have call successors, (10321) [2022-07-21 08:02:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61783 states to 61783 states and 95590 transitions. [2022-07-21 08:02:49,276 INFO L78 Accepts]: Start accepts. Automaton has 61783 states and 95590 transitions. Word has length 191 [2022-07-21 08:02:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:02:49,277 INFO L495 AbstractCegarLoop]: Abstraction has 61783 states and 95590 transitions. [2022-07-21 08:02:49,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 08:02:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 61783 states and 95590 transitions. [2022-07-21 08:02:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-21 08:02:49,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:02:49,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:02:49,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 08:02:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-21 08:02:49,611 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:02:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:02:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -275882679, now seen corresponding path program 1 times [2022-07-21 08:02:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:02:49,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465359860] [2022-07-21 08:02:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:02:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:02:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:02:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:02:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:02:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:02:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 08:02:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:02:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-21 08:02:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:02:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-07-21 08:02:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-21 08:02:49,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:02:49,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465359860] [2022-07-21 08:02:49,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465359860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:02:49,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006306234] [2022-07-21 08:02:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:02:49,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:02:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:02:49,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:02:49,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 08:02:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:02:49,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:02:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:02:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 08:02:49,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:02:49,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006306234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:02:49,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:02:49,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-21 08:02:49,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449979224] [2022-07-21 08:02:49,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:02:49,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:02:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:02:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:02:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:49,934 INFO L87 Difference]: Start difference. First operand 61783 states and 95590 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 08:02:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:02:55,868 INFO L93 Difference]: Finished difference Result 183883 states and 287012 transitions. [2022-07-21 08:02:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:02:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2022-07-21 08:02:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:02:56,351 INFO L225 Difference]: With dead ends: 183883 [2022-07-21 08:02:56,351 INFO L226 Difference]: Without dead ends: 122123 [2022-07-21 08:02:56,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:02:56,514 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 166 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:02:56,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 550 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:02:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122123 states. [2022-07-21 08:03:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122123 to 121351. [2022-07-21 08:03:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121351 states, 105801 states have (on average 1.5021408115235206) internal successors, (158928), 108684 states have internal predecessors, (158928), 8261 states have call successors, (8261), 4537 states have call predecessors, (8261), 7288 states have return successors, (20237), 8161 states have call predecessors, (20237), 8259 states have call successors, (20237) [2022-07-21 08:03:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121351 states to 121351 states and 187426 transitions. [2022-07-21 08:03:03,783 INFO L78 Accepts]: Start accepts. Automaton has 121351 states and 187426 transitions. Word has length 191 [2022-07-21 08:03:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:03:03,783 INFO L495 AbstractCegarLoop]: Abstraction has 121351 states and 187426 transitions. [2022-07-21 08:03:03,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 08:03:03,784 INFO L276 IsEmpty]: Start isEmpty. Operand 121351 states and 187426 transitions. [2022-07-21 08:03:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-21 08:03:04,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:03:04,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:03:04,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 08:03:04,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-21 08:03:04,560 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:03:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:03:04,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1664764034, now seen corresponding path program 1 times [2022-07-21 08:03:04,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:03:04,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063821946] [2022-07-21 08:03:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:03:04,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:03:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:03:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:03:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:03:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:03:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:03:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-21 08:03:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-21 08:03:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:03:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-21 08:03:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:03:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-07-21 08:03:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-21 08:03:04,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:03:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063821946] [2022-07-21 08:03:04,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063821946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:03:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607395225] [2022-07-21 08:03:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:03:04,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:03:04,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:03:04,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:03:04,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 08:03:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:04,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:03:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:03:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 08:03:04,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:03:04,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607395225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:03:04,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:03:04,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-21 08:03:04,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947472368] [2022-07-21 08:03:04,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:03:04,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:03:04,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:03:04,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:03:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:03:04,893 INFO L87 Difference]: Start difference. First operand 121351 states and 187426 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 08:03:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:03:10,520 INFO L93 Difference]: Finished difference Result 183557 states and 284310 transitions. [2022-07-21 08:03:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:03:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 210 [2022-07-21 08:03:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:03:10,844 INFO L225 Difference]: With dead ends: 183557 [2022-07-21 08:03:10,845 INFO L226 Difference]: Without dead ends: 100009 [2022-07-21 08:03:11,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:03:11,231 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 191 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:03:11,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 323 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:03:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100009 states. [2022-07-21 08:03:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100009 to 70241. [2022-07-21 08:03:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70241 states, 61783 states have (on average 1.4456727578783808) internal successors, (89318), 62722 states have internal predecessors, (89318), 4763 states have call successors, (4763), 2831 states have call predecessors, (4763), 3694 states have return successors, (8641), 4705 states have call predecessors, (8641), 4761 states have call successors, (8641) [2022-07-21 08:03:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70241 states to 70241 states and 102722 transitions. [2022-07-21 08:03:16,392 INFO L78 Accepts]: Start accepts. Automaton has 70241 states and 102722 transitions. Word has length 210 [2022-07-21 08:03:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:03:16,392 INFO L495 AbstractCegarLoop]: Abstraction has 70241 states and 102722 transitions. [2022-07-21 08:03:16,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 08:03:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 70241 states and 102722 transitions. [2022-07-21 08:03:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-21 08:03:16,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:03:16,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:03:16,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 08:03:16,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 08:03:16,923 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:03:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:03:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2010802143, now seen corresponding path program 1 times [2022-07-21 08:03:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:03:16,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919319294] [2022-07-21 08:03:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:03:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:03:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 08:03:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:16,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 08:03:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:16,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 08:03:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 08:03:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 08:03:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-21 08:03:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-21 08:03:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:03:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-21 08:03:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 08:03:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-07-21 08:03:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-21 08:03:17,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:03:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919319294] [2022-07-21 08:03:17,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919319294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:03:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816038953] [2022-07-21 08:03:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:03:17,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:03:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:03:17,032 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:03:17,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 08:03:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:03:17,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:03:17,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:03:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-21 08:03:17,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:03:17,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816038953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:03:17,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:03:17,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-21 08:03:17,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342074696] [2022-07-21 08:03:17,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:03:17,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:03:17,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:03:17,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:03:17,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:03:17,201 INFO L87 Difference]: Start difference. First operand 70241 states and 102722 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 08:03:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:03:21,901 INFO L93 Difference]: Finished difference Result 122452 states and 177969 transitions. [2022-07-21 08:03:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:03:21,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 210 [2022-07-21 08:03:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted.