./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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.13.cil-1.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 0c76345a7418e3e3e542d36688efe541ee3690f4974296017bb3a3a18fafce6e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:03:45,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:03:45,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:03:45,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:03:45,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:03:45,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:03:45,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:03:45,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:03:45,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:03:45,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:03:45,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:03:45,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:03:45,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:03:45,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:03:45,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:03:45,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:03:45,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:03:45,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:03:45,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:03:45,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:03:45,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:03:45,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:03:45,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:03:45,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:03:45,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:03:45,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:03:45,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:03:45,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:03:45,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:03:45,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:03:45,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:03:45,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:03:45,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:03:45,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:03:45,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:03:45,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:03:45,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:03:45,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:03:45,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:03:45,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:03:45,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:03:45,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:03:45,661 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:03:45,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:03:45,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:03:45,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:03:45,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:03:45,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:03:45,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:03:45,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:03:45,663 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:03:45,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:03:45,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:03:45,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:03:45,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:03:45,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:03:45,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:03:45,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:03:45,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:03:45,665 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:03:45,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:03:45,665 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:03:45,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:03:45,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:03:45,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:03:45,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:03:45,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:03:45,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:03:45,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:03:45,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:03:45,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:03:45,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:03:45,667 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:03:45,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:03:45,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:03:45,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:03:45,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c76345a7418e3e3e542d36688efe541ee3690f4974296017bb3a3a18fafce6e [2021-12-17 21:03:45,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:03:45,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:03:45,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:03:45,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:03:45,908 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:03:45,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-1.c [2021-12-17 21:03:45,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da01d60cb/6ab043466e0c4e19b7b4b4bc27e6c2f5/FLAG32132e9e6 [2021-12-17 21:03:46,332 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:03:46,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-1.c [2021-12-17 21:03:46,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da01d60cb/6ab043466e0c4e19b7b4b4bc27e6c2f5/FLAG32132e9e6 [2021-12-17 21:03:46,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da01d60cb/6ab043466e0c4e19b7b4b4bc27e6c2f5 [2021-12-17 21:03:46,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:03:46,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:03:46,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:03:46,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:03:46,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:03:46,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:03:46" (1/1) ... [2021-12-17 21:03:46,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d116778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:46, skipping insertion in model container [2021-12-17 21:03:46,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:03:46" (1/1) ... [2021-12-17 21:03:46,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:03:46,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:03:46,901 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.13.cil-1.c[913,926] [2021-12-17 21:03:46,925 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.13.cil-1.c[5977,5990] [2021-12-17 21:03:46,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:03:46,998 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:03:47,005 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.13.cil-1.c[913,926] [2021-12-17 21:03:47,012 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.13.cil-1.c[5977,5990] [2021-12-17 21:03:47,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:03:47,076 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:03:47,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47 WrapperNode [2021-12-17 21:03:47,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:03:47,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:03:47,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:03:47,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:03:47,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,150 INFO L137 Inliner]: procedures = 74, calls = 88, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1118 [2021-12-17 21:03:47,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:03:47,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:03:47,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:03:47,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:03:47,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:03:47,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:03:47,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:03:47,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:03:47,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (1/1) ... [2021-12-17 21:03:47,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:03:47,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:47,258 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) [2021-12-17 21:03:47,292 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 [2021-12-17 21:03:47,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:03:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:03:47,317 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:03:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-17 21:03:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-17 21:03:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:03:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:03:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:03:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:03:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:03:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:03:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:03:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:03:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:03:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:03:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:03:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:03:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:03:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:03:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:03:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:03:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:03:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-17 21:03:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-17 21:03:47,441 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:03:47,442 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:03:48,032 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:03:48,040 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:03:48,040 INFO L301 CfgBuilder]: Removed 20 assume(true) statements. [2021-12-17 21:03:48,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:03:48 BoogieIcfgContainer [2021-12-17 21:03:48,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:03:48,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:03:48,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:03:48,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:03:48,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:03:46" (1/3) ... [2021-12-17 21:03:48,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ba794e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:03:48, skipping insertion in model container [2021-12-17 21:03:48,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:47" (2/3) ... [2021-12-17 21:03:48,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ba794e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:03:48, skipping insertion in model container [2021-12-17 21:03:48,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:03:48" (3/3) ... [2021-12-17 21:03:48,048 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.13.cil-1.c [2021-12-17 21:03:48,051 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:03:48,051 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:03:48,080 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:03:48,084 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:03:48,084 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:03:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 487 states, 439 states have (on average 1.6560364464692483) internal successors, (727), 446 states have internal predecessors, (727), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-17 21:03:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 21:03:48,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:48,112 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:48,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash 657340763, now seen corresponding path program 1 times [2021-12-17 21:03:48,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:48,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081114644] [2021-12-17 21:03:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:48,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 21:03:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:48,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:48,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081114644] [2021-12-17 21:03:48,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081114644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:48,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:48,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:48,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186673185] [2021-12-17 21:03:48,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:48,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:48,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:48,367 INFO L87 Difference]: Start difference. First operand has 487 states, 439 states have (on average 1.6560364464692483) internal successors, (727), 446 states have internal predecessors, (727), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 21:03:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:48,844 INFO L93 Difference]: Finished difference Result 955 states and 1559 transitions. [2021-12-17 21:03:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:48,846 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), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-17 21:03:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:48,856 INFO L225 Difference]: With dead ends: 955 [2021-12-17 21:03:48,856 INFO L226 Difference]: Without dead ends: 485 [2021-12-17 21:03:48,860 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:03:48,864 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 407 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:48,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1482 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:03:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-12-17 21:03:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 476. [2021-12-17 21:03:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 431 states have (on average 1.5638051044083527) internal successors, (674), 435 states have internal predecessors, (674), 35 states have call successors, (35), 10 states have call predecessors, (35), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 21:03:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 740 transitions. [2021-12-17 21:03:48,913 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 740 transitions. Word has length 44 [2021-12-17 21:03:48,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:48,913 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 740 transitions. [2021-12-17 21:03:48,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 21:03:48,913 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 740 transitions. [2021-12-17 21:03:48,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 21:03:48,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:48,916 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:48,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:03:48,916 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1792259367, now seen corresponding path program 1 times [2021-12-17 21:03:48,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:48,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866709496] [2021-12-17 21:03:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:48,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 21:03:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:48,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:48,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866709496] [2021-12-17 21:03:48,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866709496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:48,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:48,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:48,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145801482] [2021-12-17 21:03:48,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:48,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:48,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:48,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:48,973 INFO L87 Difference]: Start difference. First operand 476 states and 740 transitions. 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) [2021-12-17 21:03:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:49,121 INFO L93 Difference]: Finished difference Result 608 states and 925 transitions. [2021-12-17 21:03:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:49,122 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 [2021-12-17 21:03:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:49,125 INFO L225 Difference]: With dead ends: 608 [2021-12-17 21:03:49,125 INFO L226 Difference]: Without dead ends: 546 [2021-12-17 21:03:49,125 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:03:49,126 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1008 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:49,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1177 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-17 21:03:49,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 540. [2021-12-17 21:03:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 488 states have (on average 1.5368852459016393) internal successors, (750), 493 states have internal predecessors, (750), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-17 21:03:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 830 transitions. [2021-12-17 21:03:49,147 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 830 transitions. Word has length 44 [2021-12-17 21:03:49,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:49,147 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 830 transitions. [2021-12-17 21:03:49,148 INFO L471 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) [2021-12-17 21:03:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 830 transitions. [2021-12-17 21:03:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:03:49,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:49,149 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:49,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:03:49,150 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:49,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1280815605, now seen corresponding path program 1 times [2021-12-17 21:03:49,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:49,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225223957] [2021-12-17 21:03:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:49,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:03:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:49,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225223957] [2021-12-17 21:03:49,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225223957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:49,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:49,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:49,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011903366] [2021-12-17 21:03:49,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:49,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:49,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:49,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:49,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:49,202 INFO L87 Difference]: Start difference. First operand 540 states and 830 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) [2021-12-17 21:03:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:49,583 INFO L93 Difference]: Finished difference Result 788 states and 1170 transitions. [2021-12-17 21:03:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:49,583 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 [2021-12-17 21:03:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:49,586 INFO L225 Difference]: With dead ends: 788 [2021-12-17 21:03:49,586 INFO L226 Difference]: Without dead ends: 664 [2021-12-17 21:03:49,587 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:03:49,588 INFO L933 BasicCegarLoop]: 786 mSDtfsCounter, 388 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:49,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1588 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:03:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-17 21:03:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 607. [2021-12-17 21:03:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 549 states have (on average 1.5191256830601092) internal successors, (834), 554 states have internal predecessors, (834), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (44), 38 states have call predecessors, (44), 38 states have call successors, (44) [2021-12-17 21:03:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 920 transitions. [2021-12-17 21:03:49,605 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 920 transitions. Word has length 45 [2021-12-17 21:03:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:49,606 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 920 transitions. [2021-12-17 21:03:49,606 INFO L471 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) [2021-12-17 21:03:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 920 transitions. [2021-12-17 21:03:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:03:49,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:49,608 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:49,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:03:49,608 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:49,609 INFO L85 PathProgramCache]: Analyzing trace with hash -3541856, now seen corresponding path program 1 times [2021-12-17 21:03:49,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:49,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793251848] [2021-12-17 21:03:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:49,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:03:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:49,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:49,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793251848] [2021-12-17 21:03:49,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793251848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:49,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:49,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:49,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597465294] [2021-12-17 21:03:49,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:49,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:49,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:49,645 INFO L87 Difference]: Start difference. First operand 607 states and 920 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) [2021-12-17 21:03:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:49,778 INFO L93 Difference]: Finished difference Result 1015 states and 1479 transitions. [2021-12-17 21:03:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:49,779 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 [2021-12-17 21:03:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:49,782 INFO L225 Difference]: With dead ends: 1015 [2021-12-17 21:03:49,783 INFO L226 Difference]: Without dead ends: 824 [2021-12-17 21:03:49,783 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:03:49,784 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 1025 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:49,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1052 Valid, 1204 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-12-17 21:03:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 772. [2021-12-17 21:03:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 695 states have (on average 1.4733812949640288) internal successors, (1024), 703 states have internal predecessors, (1024), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (61), 47 states have call predecessors, (61), 49 states have call successors, (61) [2021-12-17 21:03:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1138 transitions. [2021-12-17 21:03:49,825 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1138 transitions. Word has length 45 [2021-12-17 21:03:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:49,826 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 1138 transitions. [2021-12-17 21:03:49,826 INFO L471 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) [2021-12-17 21:03:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1138 transitions. [2021-12-17 21:03:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 21:03:49,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:49,828 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:49,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:03:49,828 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1415426807, now seen corresponding path program 1 times [2021-12-17 21:03:49,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:49,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831918396] [2021-12-17 21:03:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:49,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:03:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:03:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:03:49,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831918396] [2021-12-17 21:03:49,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831918396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:49,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:49,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:49,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781156354] [2021-12-17 21:03:49,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:49,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:49,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:49,871 INFO L87 Difference]: Start difference. First operand 772 states and 1138 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) [2021-12-17 21:03:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:50,264 INFO L93 Difference]: Finished difference Result 1116 states and 1599 transitions. [2021-12-17 21:03:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:50,264 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 [2021-12-17 21:03:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:50,267 INFO L225 Difference]: With dead ends: 1116 [2021-12-17 21:03:50,268 INFO L226 Difference]: Without dead ends: 879 [2021-12-17 21:03:50,268 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:03:50,269 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 372 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:50,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1612 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:03:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-12-17 21:03:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 841. [2021-12-17 21:03:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 755 states have (on average 1.4490066225165563) internal successors, (1094), 764 states have internal predecessors, (1094), 58 states have call successors, (58), 25 states have call predecessors, (58), 26 states have return successors, (70), 52 states have call predecessors, (70), 54 states have call successors, (70) [2021-12-17 21:03:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1222 transitions. [2021-12-17 21:03:50,293 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1222 transitions. Word has length 62 [2021-12-17 21:03:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:50,293 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1222 transitions. [2021-12-17 21:03:50,293 INFO L471 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) [2021-12-17 21:03:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1222 transitions. [2021-12-17 21:03:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 21:03:50,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:50,295 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:50,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:03:50,295 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:50,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:50,295 INFO L85 PathProgramCache]: Analyzing trace with hash -558830938, now seen corresponding path program 1 times [2021-12-17 21:03:50,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:50,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021260590] [2021-12-17 21:03:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:50,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:03:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:03:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 21:03:50,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:50,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021260590] [2021-12-17 21:03:50,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021260590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:50,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:50,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:50,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400478531] [2021-12-17 21:03:50,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:50,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:50,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:50,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:50,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:50,332 INFO L87 Difference]: Start difference. First operand 841 states and 1222 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) [2021-12-17 21:03:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:50,473 INFO L93 Difference]: Finished difference Result 1392 states and 1944 transitions. [2021-12-17 21:03:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:50,474 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 [2021-12-17 21:03:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:50,477 INFO L225 Difference]: With dead ends: 1392 [2021-12-17 21:03:50,477 INFO L226 Difference]: Without dead ends: 1014 [2021-12-17 21:03:50,478 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:03:50,479 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1012 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:50,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1039 Valid, 1201 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:50,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-12-17 21:03:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 959. [2021-12-17 21:03:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 860 states have (on average 1.4186046511627908) internal successors, (1220), 870 states have internal predecessors, (1220), 65 states have call successors, (65), 30 states have call predecessors, (65), 32 states have return successors, (81), 59 states have call predecessors, (81), 61 states have call successors, (81) [2021-12-17 21:03:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1366 transitions. [2021-12-17 21:03:50,505 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1366 transitions. Word has length 67 [2021-12-17 21:03:50,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:50,505 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 1366 transitions. [2021-12-17 21:03:50,506 INFO L471 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) [2021-12-17 21:03:50,506 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1366 transitions. [2021-12-17 21:03:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 21:03:50,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:50,507 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:50,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:03:50,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1719872919, now seen corresponding path program 1 times [2021-12-17 21:03:50,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:50,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913581508] [2021-12-17 21:03:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:50,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:03:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 21:03:50,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:50,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913581508] [2021-12-17 21:03:50,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913581508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:50,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340086568] [2021-12-17 21:03:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:50,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:50,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:50,593 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) [2021-12-17 21:03:50,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:03:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:03:50,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:03:50,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:03:50,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340086568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:50,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:03:50,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:03:50,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300127457] [2021-12-17 21:03:50,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:50,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:03:50,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:50,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:03:50,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:50,876 INFO L87 Difference]: Start difference. First operand 959 states and 1366 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) [2021-12-17 21:03:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:50,913 INFO L93 Difference]: Finished difference Result 1402 states and 1961 transitions. [2021-12-17 21:03:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:03:50,914 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 [2021-12-17 21:03:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:50,917 INFO L225 Difference]: With dead ends: 1402 [2021-12-17 21:03:50,917 INFO L226 Difference]: Without dead ends: 957 [2021-12-17 21:03:50,930 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:03:50,931 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 72 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1502 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 [2021-12-17 21:03:50,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1502 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:03:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-12-17 21:03:50,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 913. [2021-12-17 21:03:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 820 states have (on average 1.4121951219512194) internal successors, (1158), 830 states have internal predecessors, (1158), 61 states have call successors, (61), 28 states have call predecessors, (61), 30 states have return successors, (75), 55 states have call predecessors, (75), 57 states have call successors, (75) [2021-12-17 21:03:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1294 transitions. [2021-12-17 21:03:50,995 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1294 transitions. Word has length 68 [2021-12-17 21:03:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:51,012 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1294 transitions. [2021-12-17 21:03:51,012 INFO L471 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) [2021-12-17 21:03:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1294 transitions. [2021-12-17 21:03:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 21:03:51,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:51,014 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:51,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:03:51,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:51,236 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash 460098856, now seen corresponding path program 1 times [2021-12-17 21:03:51,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:51,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507260278] [2021-12-17 21:03:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:51,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:03:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:03:51,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:51,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507260278] [2021-12-17 21:03:51,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507260278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:51,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671339486] [2021-12-17 21:03:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:51,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:51,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:51,315 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) [2021-12-17 21:03:51,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 21:03:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:03:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:51,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:03:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:03:51,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671339486] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:51,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:03:51,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-17 21:03:51,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119248857] [2021-12-17 21:03:51,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:51,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:51,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:51,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:51,694 INFO L87 Difference]: Start difference. First operand 913 states and 1294 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) [2021-12-17 21:03:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:51,816 INFO L93 Difference]: Finished difference Result 964 states and 1355 transitions. [2021-12-17 21:03:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 21:03:51,817 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 [2021-12-17 21:03:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:51,821 INFO L225 Difference]: With dead ends: 964 [2021-12-17 21:03:51,821 INFO L226 Difference]: Without dead ends: 961 [2021-12-17 21:03:51,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:03:51,821 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1351 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:51,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 827 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2021-12-17 21:03:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 912. [2021-12-17 21:03:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 820 states have (on average 1.4097560975609755) internal successors, (1156), 829 states have internal predecessors, (1156), 60 states have call successors, (60), 28 states have call predecessors, (60), 30 states have return successors, (75), 55 states have call predecessors, (75), 57 states have call successors, (75) [2021-12-17 21:03:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1291 transitions. [2021-12-17 21:03:51,847 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1291 transitions. Word has length 68 [2021-12-17 21:03:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:51,848 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1291 transitions. [2021-12-17 21:03:51,848 INFO L471 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) [2021-12-17 21:03:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1291 transitions. [2021-12-17 21:03:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 21:03:51,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:51,849 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:51,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 21:03:52,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-17 21:03:52,066 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1376668361, now seen corresponding path program 1 times [2021-12-17 21:03:52,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:52,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658282448] [2021-12-17 21:03:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:52,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:03:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:03:52,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:52,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658282448] [2021-12-17 21:03:52,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658282448] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:52,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24084016] [2021-12-17 21:03:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:52,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:52,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:52,152 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) [2021-12-17 21:03:52,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 21:03:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:03:52,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:52,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:03:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:03:52,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24084016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:03:52,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 21:03:52,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-17 21:03:52,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719886658] [2021-12-17 21:03:52,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 21:03:52,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 21:03:52,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:52,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 21:03:52,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:52,715 INFO L87 Difference]: Start difference. First operand 912 states and 1291 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) [2021-12-17 21:03:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:54,044 INFO L93 Difference]: Finished difference Result 2253 states and 3014 transitions. [2021-12-17 21:03:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 21:03:54,045 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 [2021-12-17 21:03:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:54,051 INFO L225 Difference]: With dead ends: 2253 [2021-12-17 21:03:54,051 INFO L226 Difference]: Without dead ends: 1857 [2021-12-17 21:03:54,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 21:03:54,053 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 2009 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 3999 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:54,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2043 Valid, 3999 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:03:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-12-17 21:03:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1276. [2021-12-17 21:03:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1148 states have (on average 1.3562717770034842) internal successors, (1557), 1163 states have internal predecessors, (1557), 79 states have call successors, (79), 41 states have call predecessors, (79), 47 states have return successors, (106), 72 states have call predecessors, (106), 76 states have call successors, (106) [2021-12-17 21:03:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1742 transitions. [2021-12-17 21:03:54,121 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1742 transitions. Word has length 69 [2021-12-17 21:03:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:54,122 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 1742 transitions. [2021-12-17 21:03:54,122 INFO L471 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) [2021-12-17 21:03:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1742 transitions. [2021-12-17 21:03:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-17 21:03:54,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:54,124 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:54,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 21:03:54,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:54,342 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1823241683, now seen corresponding path program 1 times [2021-12-17 21:03:54,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:54,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185213828] [2021-12-17 21:03:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:54,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:54,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:54,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:54,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:03:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:54,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 21:03:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 21:03:54,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:54,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185213828] [2021-12-17 21:03:54,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185213828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:54,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215483384] [2021-12-17 21:03:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:54,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:54,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:54,397 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) [2021-12-17 21:03:54,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 21:03:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:03:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:03:54,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:03:54,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215483384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:54,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:03:54,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:03:54,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028190230] [2021-12-17 21:03:54,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:54,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:03:54,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:03:54,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:54,611 INFO L87 Difference]: Start difference. First operand 1276 states and 1742 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) [2021-12-17 21:03:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:54,666 INFO L93 Difference]: Finished difference Result 1888 states and 2520 transitions. [2021-12-17 21:03:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:03:54,679 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 [2021-12-17 21:03:54,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:54,683 INFO L225 Difference]: With dead ends: 1888 [2021-12-17 21:03:54,683 INFO L226 Difference]: Without dead ends: 1216 [2021-12-17 21:03:54,684 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:03:54,685 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 699 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 841 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 [2021-12-17 21:03:54,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 841 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:03:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-17 21:03:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1210. [2021-12-17 21:03:54,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1089 states have (on average 1.3535353535353536) internal successors, (1474), 1104 states have internal predecessors, (1474), 76 states have call successors, (76), 38 states have call predecessors, (76), 43 states have return successors, (101), 68 states have call predecessors, (101), 73 states have call successors, (101) [2021-12-17 21:03:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1651 transitions. [2021-12-17 21:03:54,746 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1651 transitions. Word has length 88 [2021-12-17 21:03:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:54,759 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1651 transitions. [2021-12-17 21:03:54,760 INFO L471 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) [2021-12-17 21:03:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1651 transitions. [2021-12-17 21:03:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 21:03:54,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:54,762 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:03:54,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 21:03:54,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:54,962 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:54,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash -418359059, now seen corresponding path program 1 times [2021-12-17 21:03:54,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:54,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532179920] [2021-12-17 21:03:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:54,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:54,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:54,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:03:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 21:03:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:03:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 21:03:55,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:55,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532179920] [2021-12-17 21:03:55,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532179920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:55,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706328107] [2021-12-17 21:03:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:55,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:55,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:55,036 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) [2021-12-17 21:03:55,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 21:03:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:03:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:03:55,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:03:55,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706328107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:55,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:03:55,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:03:55,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572960516] [2021-12-17 21:03:55,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:55,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:03:55,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:03:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:55,322 INFO L87 Difference]: Start difference. First operand 1210 states and 1651 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) [2021-12-17 21:03:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:55,358 INFO L93 Difference]: Finished difference Result 1520 states and 2032 transitions. [2021-12-17 21:03:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:03:55,359 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 [2021-12-17 21:03:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:55,361 INFO L225 Difference]: With dead ends: 1520 [2021-12-17 21:03:55,361 INFO L226 Difference]: Without dead ends: 410 [2021-12-17 21:03:55,363 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:03:55,363 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 60 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1496 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 [2021-12-17 21:03:55,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1496 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:03:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-17 21:03:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-12-17 21:03:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.585561497326203) internal successors, (593), 376 states have internal predecessors, (593), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 21:03:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 649 transitions. [2021-12-17 21:03:55,373 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 649 transitions. Word has length 103 [2021-12-17 21:03:55,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:55,373 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 649 transitions. [2021-12-17 21:03:55,373 INFO L471 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) [2021-12-17 21:03:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 649 transitions. [2021-12-17 21:03:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:03:55,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:55,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:55,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 21:03:55,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 21:03:55,594 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2055015172, now seen corresponding path program 1 times [2021-12-17 21:03:55,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:55,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348507057] [2021-12-17 21:03:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:55,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:03:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:03:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:03:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:03:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:55,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348507057] [2021-12-17 21:03:55,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348507057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:55,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:55,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:03:55,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781752566] [2021-12-17 21:03:55,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:55,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:03:55,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:55,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:03:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:55,692 INFO L87 Difference]: Start difference. First operand 410 states and 649 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-17 21:03:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:56,834 INFO L93 Difference]: Finished difference Result 964 states and 1549 transitions. [2021-12-17 21:03:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:03:56,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-17 21:03:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:56,837 INFO L225 Difference]: With dead ends: 964 [2021-12-17 21:03:56,837 INFO L226 Difference]: Without dead ends: 563 [2021-12-17 21:03:56,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:56,838 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 1119 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:56,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1144 Valid, 1170 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:03:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-17 21:03:56,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 410. [2021-12-17 21:03:56,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.5828877005347595) internal successors, (592), 376 states have internal predecessors, (592), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 21:03:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 648 transitions. [2021-12-17 21:03:56,856 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 648 transitions. Word has length 190 [2021-12-17 21:03:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:56,856 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 648 transitions. [2021-12-17 21:03:56,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-17 21:03:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 648 transitions. [2021-12-17 21:03:56,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:03:56,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:56,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:56,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:03:56,871 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:56,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:56,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1767612478, now seen corresponding path program 1 times [2021-12-17 21:03:56,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:56,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852598099] [2021-12-17 21:03:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:56,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:03:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:03:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:03:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:03:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:56,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:56,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852598099] [2021-12-17 21:03:56,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852598099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:56,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:56,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:03:56,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569678263] [2021-12-17 21:03:56,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:56,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:03:56,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:56,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:03:56,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:56,994 INFO L87 Difference]: Start difference. First operand 410 states and 648 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-17 21:03:58,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:58,183 INFO L93 Difference]: Finished difference Result 956 states and 1532 transitions. [2021-12-17 21:03:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:03:58,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-17 21:03:58,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:58,186 INFO L225 Difference]: With dead ends: 956 [2021-12-17 21:03:58,186 INFO L226 Difference]: Without dead ends: 563 [2021-12-17 21:03:58,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:58,188 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 1110 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:58,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 1168 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:03:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-17 21:03:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 410. [2021-12-17 21:03:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.5802139037433156) internal successors, (591), 376 states have internal predecessors, (591), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 21:03:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 647 transitions. [2021-12-17 21:03:58,207 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 647 transitions. Word has length 190 [2021-12-17 21:03:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:58,207 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 647 transitions. [2021-12-17 21:03:58,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-17 21:03:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 647 transitions. [2021-12-17 21:03:58,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:03:58,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:58,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:58,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:03:58,209 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:58,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1158894208, now seen corresponding path program 1 times [2021-12-17 21:03:58,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:58,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555887185] [2021-12-17 21:03:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:58,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:03:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:03:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:03:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:03:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:58,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:58,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555887185] [2021-12-17 21:03:58,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555887185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:58,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:58,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:03:58,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984687669] [2021-12-17 21:03:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:58,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:03:58,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:58,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:03:58,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:03:58,352 INFO L87 Difference]: Start difference. First operand 410 states and 647 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-17 21:03:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:59,941 INFO L93 Difference]: Finished difference Result 950 states and 1522 transitions. [2021-12-17 21:03:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:03:59,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 190 [2021-12-17 21:03:59,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:59,944 INFO L225 Difference]: With dead ends: 950 [2021-12-17 21:03:59,944 INFO L226 Difference]: Without dead ends: 562 [2021-12-17 21:03:59,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:03:59,946 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 1101 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:59,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1403 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:03:59,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-17 21:03:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 410. [2021-12-17 21:03:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.5775401069518717) internal successors, (590), 376 states have internal predecessors, (590), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 21:03:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 646 transitions. [2021-12-17 21:03:59,962 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 646 transitions. Word has length 190 [2021-12-17 21:03:59,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:59,963 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 646 transitions. [2021-12-17 21:03:59,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-17 21:03:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 646 transitions. [2021-12-17 21:03:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:03:59,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:59,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:59,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:03:59,965 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash -650115394, now seen corresponding path program 1 times [2021-12-17 21:03:59,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:59,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528361958] [2021-12-17 21:03:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:59,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:59,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:00,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:00,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528361958] [2021-12-17 21:04:00,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528361958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:00,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:00,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:00,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778621147] [2021-12-17 21:04:00,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:00,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:00,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:00,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:00,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:00,115 INFO L87 Difference]: Start difference. First operand 410 states and 646 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:01,544 INFO L93 Difference]: Finished difference Result 977 states and 1573 transitions. [2021-12-17 21:04:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:01,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:01,547 INFO L225 Difference]: With dead ends: 977 [2021-12-17 21:04:01,547 INFO L226 Difference]: Without dead ends: 589 [2021-12-17 21:04:01,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:01,548 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 1383 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:01,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1404 Valid, 1531 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:04:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-12-17 21:04:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 410. [2021-12-17 21:04:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.5748663101604279) internal successors, (589), 376 states have internal predecessors, (589), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 21:04:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 645 transitions. [2021-12-17 21:04:01,566 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 645 transitions. Word has length 190 [2021-12-17 21:04:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:01,566 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 645 transitions. [2021-12-17 21:04:01,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 645 transitions. [2021-12-17 21:04:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:01,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:01,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:01,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:04:01,568 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1721601472, now seen corresponding path program 1 times [2021-12-17 21:04:01,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:01,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747216934] [2021-12-17 21:04:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:01,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:01,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:01,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747216934] [2021-12-17 21:04:01,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747216934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:01,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:01,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:01,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390466461] [2021-12-17 21:04:01,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:01,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:01,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:01,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:01,696 INFO L87 Difference]: Start difference. First operand 410 states and 645 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:03,200 INFO L93 Difference]: Finished difference Result 975 states and 1567 transitions. [2021-12-17 21:04:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:03,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:03,203 INFO L225 Difference]: With dead ends: 975 [2021-12-17 21:04:03,203 INFO L226 Difference]: Without dead ends: 587 [2021-12-17 21:04:03,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:03,205 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 1199 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:03,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 1743 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:04:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-12-17 21:04:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 410. [2021-12-17 21:04:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.572192513368984) internal successors, (588), 376 states have internal predecessors, (588), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 21:04:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 644 transitions. [2021-12-17 21:04:03,223 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 644 transitions. Word has length 190 [2021-12-17 21:04:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:03,223 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 644 transitions. [2021-12-17 21:04:03,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 644 transitions. [2021-12-17 21:04:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:03,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:03,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:03,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:04:03,225 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:03,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:03,225 INFO L85 PathProgramCache]: Analyzing trace with hash -3006850, now seen corresponding path program 1 times [2021-12-17 21:04:03,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:03,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319135423] [2021-12-17 21:04:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:03,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:03,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:03,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319135423] [2021-12-17 21:04:03,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319135423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:03,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:03,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:03,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093374475] [2021-12-17 21:04:03,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:03,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:03,377 INFO L87 Difference]: Start difference. First operand 410 states and 644 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:04,650 INFO L93 Difference]: Finished difference Result 947 states and 1512 transitions. [2021-12-17 21:04:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:04:04,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:04,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:04,653 INFO L225 Difference]: With dead ends: 947 [2021-12-17 21:04:04,653 INFO L226 Difference]: Without dead ends: 559 [2021-12-17 21:04:04,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:04:04,654 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 1197 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:04,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 1684 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:04:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-12-17 21:04:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 410. [2021-12-17 21:04:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.5641711229946524) internal successors, (585), 376 states have internal predecessors, (585), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 21:04:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 641 transitions. [2021-12-17 21:04:04,687 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 641 transitions. Word has length 190 [2021-12-17 21:04:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:04,687 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 641 transitions. [2021-12-17 21:04:04,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 641 transitions. [2021-12-17 21:04:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:04,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:04,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:04,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:04:04,689 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1389036290, now seen corresponding path program 1 times [2021-12-17 21:04:04,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:04,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162812923] [2021-12-17 21:04:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:04,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:04,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:04,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:04,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:04,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:04,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:04,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:04,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162812923] [2021-12-17 21:04:04,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162812923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:04,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:04,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:04:04,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176599253] [2021-12-17 21:04:04,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:04,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:04:04,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:04,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:04:04,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:04:04,824 INFO L87 Difference]: Start difference. First operand 410 states and 641 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:07,517 INFO L93 Difference]: Finished difference Result 1530 states and 2450 transitions. [2021-12-17 21:04:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:04:07,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:07,521 INFO L225 Difference]: With dead ends: 1530 [2021-12-17 21:04:07,521 INFO L226 Difference]: Without dead ends: 1142 [2021-12-17 21:04:07,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:04:07,523 INFO L933 BasicCegarLoop]: 1079 mSDtfsCounter, 2174 mSDsluCounter, 2480 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:07,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2195 Valid, 3559 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 3011 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:04:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-12-17 21:04:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 816. [2021-12-17 21:04:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 750 states have (on average 1.5746666666666667) internal successors, (1181), 753 states have internal predecessors, (1181), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (53), 51 states have call predecessors, (53), 50 states have call successors, (53) [2021-12-17 21:04:07,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1286 transitions. [2021-12-17 21:04:07,562 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1286 transitions. Word has length 190 [2021-12-17 21:04:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:07,563 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1286 transitions. [2021-12-17 21:04:07,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:07,563 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1286 transitions. [2021-12-17 21:04:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:07,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:07,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:07,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:04:07,565 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1502061820, now seen corresponding path program 1 times [2021-12-17 21:04:07,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:07,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351626817] [2021-12-17 21:04:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:07,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:07,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:07,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:07,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:07,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:07,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:07,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351626817] [2021-12-17 21:04:07,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351626817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:07,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:07,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:04:07,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4634136] [2021-12-17 21:04:07,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:07,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:04:07,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:07,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:04:07,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:04:07,703 INFO L87 Difference]: Start difference. First operand 816 states and 1286 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:10,522 INFO L93 Difference]: Finished difference Result 3113 states and 5020 transitions. [2021-12-17 21:04:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:04:10,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:10,529 INFO L225 Difference]: With dead ends: 3113 [2021-12-17 21:04:10,529 INFO L226 Difference]: Without dead ends: 2319 [2021-12-17 21:04:10,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:04:10,531 INFO L933 BasicCegarLoop]: 1072 mSDtfsCounter, 1838 mSDsluCounter, 2880 mSDsCounter, 0 mSdLazyCounter, 3347 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 3952 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:10,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1859 Valid, 3952 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3347 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:04:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-12-17 21:04:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1673. [2021-12-17 21:04:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1545 states have (on average 1.5896440129449838) internal successors, (2456), 1552 states have internal predecessors, (2456), 98 states have call successors, (98), 25 states have call predecessors, (98), 29 states have return successors, (111), 99 states have call predecessors, (111), 96 states have call successors, (111) [2021-12-17 21:04:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2665 transitions. [2021-12-17 21:04:10,613 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2665 transitions. Word has length 190 [2021-12-17 21:04:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:10,613 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2665 transitions. [2021-12-17 21:04:10,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:10,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2665 transitions. [2021-12-17 21:04:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:10,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:10,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:10,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:04:10,616 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2006907586, now seen corresponding path program 1 times [2021-12-17 21:04:10,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:10,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477839444] [2021-12-17 21:04:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:10,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:10,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477839444] [2021-12-17 21:04:10,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477839444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:10,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:10,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:10,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169984242] [2021-12-17 21:04:10,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:10,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:10,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:10,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:10,737 INFO L87 Difference]: Start difference. First operand 1673 states and 2665 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:12,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:12,104 INFO L93 Difference]: Finished difference Result 4118 states and 6695 transitions. [2021-12-17 21:04:12,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:12,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:12,112 INFO L225 Difference]: With dead ends: 4118 [2021-12-17 21:04:12,112 INFO L226 Difference]: Without dead ends: 2467 [2021-12-17 21:04:12,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:12,115 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 1373 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:12,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 1503 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:04:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-12-17 21:04:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 1673. [2021-12-17 21:04:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1545 states have (on average 1.5870550161812298) internal successors, (2452), 1552 states have internal predecessors, (2452), 98 states have call successors, (98), 25 states have call predecessors, (98), 29 states have return successors, (111), 99 states have call predecessors, (111), 96 states have call successors, (111) [2021-12-17 21:04:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2661 transitions. [2021-12-17 21:04:12,201 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2661 transitions. Word has length 190 [2021-12-17 21:04:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:12,202 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2661 transitions. [2021-12-17 21:04:12,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2661 transitions. [2021-12-17 21:04:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:12,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:12,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:12,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:04:12,204 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1620677820, now seen corresponding path program 1 times [2021-12-17 21:04:12,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:12,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832001487] [2021-12-17 21:04:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:12,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:12,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:12,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:12,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:12,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:12,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:12,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:12,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832001487] [2021-12-17 21:04:12,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832001487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:12,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:12,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:12,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870189557] [2021-12-17 21:04:12,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:12,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:12,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:12,374 INFO L87 Difference]: Start difference. First operand 1673 states and 2661 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:13,635 INFO L93 Difference]: Finished difference Result 4109 states and 6665 transitions. [2021-12-17 21:04:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:13,643 INFO L225 Difference]: With dead ends: 4109 [2021-12-17 21:04:13,643 INFO L226 Difference]: Without dead ends: 2458 [2021-12-17 21:04:13,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:13,646 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 1449 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:13,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1470 Valid, 1456 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:04:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-12-17 21:04:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1673. [2021-12-17 21:04:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1545 states have (on average 1.5844660194174758) internal successors, (2448), 1552 states have internal predecessors, (2448), 98 states have call successors, (98), 25 states have call predecessors, (98), 29 states have return successors, (111), 99 states have call predecessors, (111), 96 states have call successors, (111) [2021-12-17 21:04:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2657 transitions. [2021-12-17 21:04:13,816 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2657 transitions. Word has length 190 [2021-12-17 21:04:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:13,817 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2657 transitions. [2021-12-17 21:04:13,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2657 transitions. [2021-12-17 21:04:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:13,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:13,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:13,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:04:13,819 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:13,820 INFO L85 PathProgramCache]: Analyzing trace with hash 479060610, now seen corresponding path program 1 times [2021-12-17 21:04:13,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:13,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895498267] [2021-12-17 21:04:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:13,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:13,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:13,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:13,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:13,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:13,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:13,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:13,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895498267] [2021-12-17 21:04:13,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895498267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:13,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:13,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:04:13,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065660514] [2021-12-17 21:04:13,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:13,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:04:13,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:13,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:04:13,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:04:13,977 INFO L87 Difference]: Start difference. First operand 1673 states and 2657 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:16,899 INFO L93 Difference]: Finished difference Result 6425 states and 10413 transitions. [2021-12-17 21:04:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:04:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:16,921 INFO L225 Difference]: With dead ends: 6425 [2021-12-17 21:04:16,921 INFO L226 Difference]: Without dead ends: 4774 [2021-12-17 21:04:16,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:04:16,924 INFO L933 BasicCegarLoop]: 1056 mSDtfsCounter, 1818 mSDsluCounter, 2880 mSDsCounter, 0 mSdLazyCounter, 3281 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1839 SdHoareTripleChecker+Valid, 3936 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:16,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1839 Valid, 3936 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3281 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:04:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2021-12-17 21:04:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 3498. [2021-12-17 21:04:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3240 states have (on average 1.6024691358024692) internal successors, (5192), 3261 states have internal predecessors, (5192), 190 states have call successors, (190), 49 states have call predecessors, (190), 67 states have return successors, (251), 195 states have call predecessors, (251), 188 states have call successors, (251) [2021-12-17 21:04:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 5633 transitions. [2021-12-17 21:04:17,112 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 5633 transitions. Word has length 190 [2021-12-17 21:04:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:17,113 INFO L470 AbstractCegarLoop]: Abstraction has 3498 states and 5633 transitions. [2021-12-17 21:04:17,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:17,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 5633 transitions. [2021-12-17 21:04:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:17,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:17,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:17,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 21:04:17,116 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 823888772, now seen corresponding path program 1 times [2021-12-17 21:04:17,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:17,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951465539] [2021-12-17 21:04:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:17,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:17,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:17,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:17,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:17,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:17,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:17,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:17,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951465539] [2021-12-17 21:04:17,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951465539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:17,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:17,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:04:17,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426623489] [2021-12-17 21:04:17,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:17,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:04:17,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:17,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:04:17,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:04:17,275 INFO L87 Difference]: Start difference. First operand 3498 states and 5633 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:20,155 INFO L93 Difference]: Finished difference Result 13497 states and 22173 transitions. [2021-12-17 21:04:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:04:20,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:20,231 INFO L225 Difference]: With dead ends: 13497 [2021-12-17 21:04:20,235 INFO L226 Difference]: Without dead ends: 10021 [2021-12-17 21:04:20,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:04:20,249 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 2147 mSDsluCounter, 2477 mSDsCounter, 0 mSdLazyCounter, 2937 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2168 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 3065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:20,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2168 Valid, 3529 Invalid, 3065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2937 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 21:04:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10021 states. [2021-12-17 21:04:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10021 to 7481. [2021-12-17 21:04:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7481 states, 6945 states have (on average 1.6253419726421887) internal successors, (11288), 7012 states have internal predecessors, (11288), 374 states have call successors, (374), 97 states have call predecessors, (374), 161 states have return successors, (627), 387 states have call predecessors, (627), 372 states have call successors, (627) [2021-12-17 21:04:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 12289 transitions. [2021-12-17 21:04:21,014 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 12289 transitions. Word has length 190 [2021-12-17 21:04:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:21,014 INFO L470 AbstractCegarLoop]: Abstraction has 7481 states and 12289 transitions. [2021-12-17 21:04:21,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 12289 transitions. [2021-12-17 21:04:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:21,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:21,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:21,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 21:04:21,018 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:21,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:21,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1804843586, now seen corresponding path program 1 times [2021-12-17 21:04:21,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:21,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040131348] [2021-12-17 21:04:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:21,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:21,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:21,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040131348] [2021-12-17 21:04:21,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040131348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:21,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:21,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:21,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666666562] [2021-12-17 21:04:21,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:21,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:21,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:21,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:21,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:21,136 INFO L87 Difference]: Start difference. First operand 7481 states and 12289 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:23,136 INFO L93 Difference]: Finished difference Result 18782 states and 31475 transitions. [2021-12-17 21:04:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:23,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:23,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:23,163 INFO L225 Difference]: With dead ends: 18782 [2021-12-17 21:04:23,163 INFO L226 Difference]: Without dead ends: 11323 [2021-12-17 21:04:23,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:23,180 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 1374 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:23,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1395 Valid, 1487 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:04:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11323 states. [2021-12-17 21:04:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11323 to 7481. [2021-12-17 21:04:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7481 states, 6945 states have (on average 1.6230381569474441) internal successors, (11272), 7012 states have internal predecessors, (11272), 374 states have call successors, (374), 97 states have call predecessors, (374), 161 states have return successors, (627), 387 states have call predecessors, (627), 372 states have call successors, (627) [2021-12-17 21:04:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 12273 transitions. [2021-12-17 21:04:23,622 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 12273 transitions. Word has length 190 [2021-12-17 21:04:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:23,622 INFO L470 AbstractCegarLoop]: Abstraction has 7481 states and 12273 transitions. [2021-12-17 21:04:23,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 12273 transitions. [2021-12-17 21:04:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:23,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:23,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:23,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 21:04:23,626 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:23,626 INFO L85 PathProgramCache]: Analyzing trace with hash 35371972, now seen corresponding path program 1 times [2021-12-17 21:04:23,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:23,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149699311] [2021-12-17 21:04:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:23,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:23,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:23,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:23,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:23,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:23,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:23,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149699311] [2021-12-17 21:04:23,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149699311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:23,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:23,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:04:23,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411452195] [2021-12-17 21:04:23,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:23,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:04:23,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:04:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:04:23,751 INFO L87 Difference]: Start difference. First operand 7481 states and 12273 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:27,502 INFO L93 Difference]: Finished difference Result 28717 states and 48009 transitions. [2021-12-17 21:04:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:04:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:27,548 INFO L225 Difference]: With dead ends: 28717 [2021-12-17 21:04:27,549 INFO L226 Difference]: Without dead ends: 21258 [2021-12-17 21:04:27,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:04:27,570 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 1801 mSDsluCounter, 2880 mSDsCounter, 0 mSdLazyCounter, 3206 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 3916 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:27,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1822 Valid, 3916 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3206 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:04:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21258 states. [2021-12-17 21:04:28,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21258 to 16230. [2021-12-17 21:04:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16230 states, 15084 states have (on average 1.647043224608857) internal successors, (24844), 15297 states have internal predecessors, (24844), 742 states have call successors, (742), 193 states have call predecessors, (742), 403 states have return successors, (1763), 771 states have call predecessors, (1763), 740 states have call successors, (1763) [2021-12-17 21:04:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16230 states to 16230 states and 27349 transitions. [2021-12-17 21:04:28,596 INFO L78 Accepts]: Start accepts. Automaton has 16230 states and 27349 transitions. Word has length 190 [2021-12-17 21:04:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:28,596 INFO L470 AbstractCegarLoop]: Abstraction has 16230 states and 27349 transitions. [2021-12-17 21:04:28,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 16230 states and 27349 transitions. [2021-12-17 21:04:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:28,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:28,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:28,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 21:04:28,602 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1369819706, now seen corresponding path program 1 times [2021-12-17 21:04:28,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:28,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330465432] [2021-12-17 21:04:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:28,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:28,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:28,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:28,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:28,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:28,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:28,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:28,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330465432] [2021-12-17 21:04:28,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330465432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:28,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:28,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:04:28,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99383560] [2021-12-17 21:04:28,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:28,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:04:28,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:28,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:04:28,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:04:28,729 INFO L87 Difference]: Start difference. First operand 16230 states and 27349 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:34,685 INFO L93 Difference]: Finished difference Result 68417 states and 116763 transitions. [2021-12-17 21:04:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:04:34,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:34,997 INFO L225 Difference]: With dead ends: 68417 [2021-12-17 21:04:34,998 INFO L226 Difference]: Without dead ends: 52209 [2021-12-17 21:04:35,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:04:35,050 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 2794 mSDsluCounter, 2465 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 3495 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:35,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2830 Valid, 3495 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2875 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 21:04:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52209 states. [2021-12-17 21:04:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52209 to 35981. [2021-12-17 21:04:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35981 states, 33485 states have (on average 1.6759743168582948) internal successors, (56120), 34152 states have internal predecessors, (56120), 1446 states have call successors, (1446), 385 states have call predecessors, (1446), 1049 states have return successors, (5539), 1507 states have call predecessors, (5539), 1444 states have call successors, (5539) [2021-12-17 21:04:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35981 states to 35981 states and 63105 transitions. [2021-12-17 21:04:37,068 INFO L78 Accepts]: Start accepts. Automaton has 35981 states and 63105 transitions. Word has length 190 [2021-12-17 21:04:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:37,068 INFO L470 AbstractCegarLoop]: Abstraction has 35981 states and 63105 transitions. [2021-12-17 21:04:37,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:04:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 35981 states and 63105 transitions. [2021-12-17 21:04:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:37,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:37,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:37,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 21:04:37,079 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash 524514180, now seen corresponding path program 1 times [2021-12-17 21:04:37,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:37,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561299671] [2021-12-17 21:04:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:37,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:37,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:37,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:37,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:37,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:37,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:37,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:37,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561299671] [2021-12-17 21:04:37,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561299671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:37,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:37,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:37,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728683167] [2021-12-17 21:04:37,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:37,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:37,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:37,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:37,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:37,217 INFO L87 Difference]: Start difference. First operand 35981 states and 63105 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:41,446 INFO L93 Difference]: Finished difference Result 91682 states and 164339 transitions. [2021-12-17 21:04:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:41,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:41,617 INFO L225 Difference]: With dead ends: 91682 [2021-12-17 21:04:41,618 INFO L226 Difference]: Without dead ends: 55723 [2021-12-17 21:04:41,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:41,703 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 1370 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:41,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 1473 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:04:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55723 states. [2021-12-17 21:04:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55723 to 35981. [2021-12-17 21:04:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35981 states, 33485 states have (on average 1.6740630132895327) internal successors, (56056), 34152 states have internal predecessors, (56056), 1446 states have call successors, (1446), 385 states have call predecessors, (1446), 1049 states have return successors, (5539), 1507 states have call predecessors, (5539), 1444 states have call successors, (5539) [2021-12-17 21:04:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35981 states to 35981 states and 63041 transitions. [2021-12-17 21:04:43,884 INFO L78 Accepts]: Start accepts. Automaton has 35981 states and 63041 transitions. Word has length 190 [2021-12-17 21:04:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:43,884 INFO L470 AbstractCegarLoop]: Abstraction has 35981 states and 63041 transitions. [2021-12-17 21:04:43,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 35981 states and 63041 transitions. [2021-12-17 21:04:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:43,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:43,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:43,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 21:04:43,895 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:43,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1971095046, now seen corresponding path program 1 times [2021-12-17 21:04:43,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:43,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411599601] [2021-12-17 21:04:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:43,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:43,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:43,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:44,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:44,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:44,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:44,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:44,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411599601] [2021-12-17 21:04:44,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411599601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:44,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:44,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:44,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422807542] [2021-12-17 21:04:44,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:44,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:44,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:44,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:44,050 INFO L87 Difference]: Start difference. First operand 35981 states and 63041 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:48,511 INFO L93 Difference]: Finished difference Result 90953 states and 162689 transitions. [2021-12-17 21:04:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:48,664 INFO L225 Difference]: With dead ends: 90953 [2021-12-17 21:04:48,664 INFO L226 Difference]: Without dead ends: 54994 [2021-12-17 21:04:48,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:48,735 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 1414 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:48,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 1442 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:04:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54994 states. [2021-12-17 21:04:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54994 to 35981. [2021-12-17 21:04:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35981 states, 33485 states have (on average 1.6721517097207705) internal successors, (55992), 34152 states have internal predecessors, (55992), 1446 states have call successors, (1446), 385 states have call predecessors, (1446), 1049 states have return successors, (5539), 1507 states have call predecessors, (5539), 1444 states have call successors, (5539) [2021-12-17 21:04:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35981 states to 35981 states and 62977 transitions. [2021-12-17 21:04:50,906 INFO L78 Accepts]: Start accepts. Automaton has 35981 states and 62977 transitions. Word has length 190 [2021-12-17 21:04:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:50,907 INFO L470 AbstractCegarLoop]: Abstraction has 35981 states and 62977 transitions. [2021-12-17 21:04:50,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 35981 states and 62977 transitions. [2021-12-17 21:04:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:50,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:50,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:50,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 21:04:50,916 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:50,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:50,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1047927620, now seen corresponding path program 1 times [2021-12-17 21:04:50,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:50,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111254024] [2021-12-17 21:04:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:50,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:50,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:50,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:51,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:51,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111254024] [2021-12-17 21:04:51,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111254024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:51,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:51,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:51,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745024258] [2021-12-17 21:04:51,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:51,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:51,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:51,030 INFO L87 Difference]: Start difference. First operand 35981 states and 62977 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:55,392 INFO L93 Difference]: Finished difference Result 90224 states and 161039 transitions. [2021-12-17 21:04:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:04:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:55,576 INFO L225 Difference]: With dead ends: 90224 [2021-12-17 21:04:55,576 INFO L226 Difference]: Without dead ends: 54265 [2021-12-17 21:04:55,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:55,663 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 1366 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:55,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 1465 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:04:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54265 states. [2021-12-17 21:04:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54265 to 35981. [2021-12-17 21:04:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35981 states, 33485 states have (on average 1.6702404061520084) internal successors, (55928), 34152 states have internal predecessors, (55928), 1446 states have call successors, (1446), 385 states have call predecessors, (1446), 1049 states have return successors, (5539), 1507 states have call predecessors, (5539), 1444 states have call successors, (5539) [2021-12-17 21:04:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35981 states to 35981 states and 62913 transitions. [2021-12-17 21:04:57,947 INFO L78 Accepts]: Start accepts. Automaton has 35981 states and 62913 transitions. Word has length 190 [2021-12-17 21:04:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:57,947 INFO L470 AbstractCegarLoop]: Abstraction has 35981 states and 62913 transitions. [2021-12-17 21:04:57,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:04:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 35981 states and 62913 transitions. [2021-12-17 21:04:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:04:57,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:57,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:57,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 21:04:57,957 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1433790022, now seen corresponding path program 1 times [2021-12-17 21:04:57,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:57,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803506262] [2021-12-17 21:04:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:57,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:57,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:04:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:04:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:04:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:04:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:58,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:58,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803506262] [2021-12-17 21:04:58,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803506262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:58,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:58,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:58,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137494818] [2021-12-17 21:04:58,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:58,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:58,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:58,073 INFO L87 Difference]: Start difference. First operand 35981 states and 62913 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:05:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:02,689 INFO L93 Difference]: Finished difference Result 89495 states and 159389 transitions. [2021-12-17 21:05:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:05:02,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:05:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:02,860 INFO L225 Difference]: With dead ends: 89495 [2021-12-17 21:05:02,860 INFO L226 Difference]: Without dead ends: 53536 [2021-12-17 21:05:02,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:05:02,942 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 1185 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:02,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 1677 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:05:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53536 states. [2021-12-17 21:05:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53536 to 35981. [2021-12-17 21:05:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35981 states, 33485 states have (on average 1.6683291025832463) internal successors, (55864), 34152 states have internal predecessors, (55864), 1446 states have call successors, (1446), 385 states have call predecessors, (1446), 1049 states have return successors, (5539), 1507 states have call predecessors, (5539), 1444 states have call successors, (5539) [2021-12-17 21:05:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35981 states to 35981 states and 62849 transitions. [2021-12-17 21:05:05,326 INFO L78 Accepts]: Start accepts. Automaton has 35981 states and 62849 transitions. Word has length 190 [2021-12-17 21:05:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:05,327 INFO L470 AbstractCegarLoop]: Abstraction has 35981 states and 62849 transitions. [2021-12-17 21:05:05,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:05:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 35981 states and 62849 transitions. [2021-12-17 21:05:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:05:05,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:05,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:05,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 21:05:05,336 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:05,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1169142532, now seen corresponding path program 1 times [2021-12-17 21:05:05,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:05,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622070874] [2021-12-17 21:05:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:05,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:05:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:05:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:05:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:05:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:05,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:05,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622070874] [2021-12-17 21:05:05,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622070874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:05,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:05,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:05:05,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587651938] [2021-12-17 21:05:05,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:05,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:05:05,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:05:05,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:05:05,625 INFO L87 Difference]: Start difference. First operand 35981 states and 62849 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:05:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:15,461 INFO L93 Difference]: Finished difference Result 142835 states and 253927 transitions. [2021-12-17 21:05:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:05:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:05:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:15,802 INFO L225 Difference]: With dead ends: 142835 [2021-12-17 21:05:15,802 INFO L226 Difference]: Without dead ends: 106876 [2021-12-17 21:05:16,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:05:16,061 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 2094 mSDsluCounter, 2868 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 3868 SdHoareTripleChecker+Invalid, 3176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:16,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2130 Valid, 3868 Invalid, 3176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:05:16,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106876 states. [2021-12-17 21:05:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106876 to 79032. [2021-12-17 21:05:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79032 states, 73382 states have (on average 1.6883704450682728) internal successors, (123896), 75443 states have internal predecessors, (123896), 2822 states have call successors, (2822), 769 states have call predecessors, (2822), 2827 states have return successors, (19203), 2947 states have call predecessors, (19203), 2820 states have call successors, (19203) [2021-12-17 21:05:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79032 states to 79032 states and 145921 transitions. [2021-12-17 21:05:21,133 INFO L78 Accepts]: Start accepts. Automaton has 79032 states and 145921 transitions. Word has length 190 [2021-12-17 21:05:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:21,155 INFO L470 AbstractCegarLoop]: Abstraction has 79032 states and 145921 transitions. [2021-12-17 21:05:21,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:05:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 79032 states and 145921 transitions. [2021-12-17 21:05:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:05:21,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:21,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:21,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 21:05:21,178 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1194699130, now seen corresponding path program 1 times [2021-12-17 21:05:21,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:21,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380110104] [2021-12-17 21:05:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:21,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:05:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:05:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:05:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:05:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:21,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:21,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380110104] [2021-12-17 21:05:21,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380110104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:21,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:21,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:21,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321414807] [2021-12-17 21:05:21,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:21,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:21,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:21,315 INFO L87 Difference]: Start difference. First operand 79032 states and 145921 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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)