./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.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 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:21:07,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:21:07,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:21:07,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:21:07,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:21:07,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:21:07,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:21:07,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:21:07,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:21:07,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:21:07,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:21:07,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:21:07,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:21:07,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:21:07,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:21:07,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:21:07,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:21:07,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:21:07,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:21:07,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:21:07,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:21:07,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:21:07,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:21:07,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:21:07,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:21:07,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:21:07,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:21:07,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:21:07,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:21:07,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:21:07,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:21:07,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:21:07,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:21:07,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:21:07,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:21:07,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:21:07,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:21:07,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:21:07,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:21:07,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:21:07,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:21:07,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:21:07,305 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:21:07,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:21:07,305 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:21:07,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:21:07,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:21:07,306 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:21:07,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:21:07,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:21:07,307 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:21:07,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:21:07,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:21:07,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:21:07,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:21:07,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:21:07,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:21:07,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:21:07,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:21:07,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:21:07,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:21:07,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:21:07,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:21:07,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:21:07,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:21:07,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:21:07,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:21:07,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:21:07,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:21:07,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:21:07,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:21:07,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:21:07,311 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:21:07,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:21:07,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:21:07,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:21:07,312 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f [2021-12-14 16:21:07,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:21:07,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:21:07,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:21:07,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:21:07,513 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:21:07,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2021-12-14 16:21:07,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a74aa5f8b/822ae92b02b94e40acd349d4ce938484/FLAGa6be72ec1 [2021-12-14 16:21:08,030 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:21:08,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2021-12-14 16:21:08,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a74aa5f8b/822ae92b02b94e40acd349d4ce938484/FLAGa6be72ec1 [2021-12-14 16:21:08,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a74aa5f8b/822ae92b02b94e40acd349d4ce938484 [2021-12-14 16:21:08,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:21:08,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:21:08,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:21:08,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:21:08,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:21:08,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1f7b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08, skipping insertion in model container [2021-12-14 16:21:08,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:21:08,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:21:08,252 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2021-12-14 16:21:08,318 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2021-12-14 16:21:08,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:21:08,406 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:21:08,422 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2021-12-14 16:21:08,434 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2021-12-14 16:21:08,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:21:08,474 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:21:08,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08 WrapperNode [2021-12-14 16:21:08,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:21:08,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:21:08,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:21:08,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:21:08,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,529 INFO L137 Inliner]: procedures = 75, calls = 92, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 967 [2021-12-14 16:21:08,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:21:08,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:21:08,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:21:08,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:21:08,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:21:08,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:21:08,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:21:08,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:21:08,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (1/1) ... [2021-12-14 16:21:08,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:21:08,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:21:08,622 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) [2021-12-14 16:21:08,627 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 [2021-12-14 16:21:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:21:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:21:08,649 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:21:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-14 16:21:08,649 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-14 16:21:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:21:08,649 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:21:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:21:08,649 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:21:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-14 16:21:08,650 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-14 16:21:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:21:08,650 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:21:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:21:08,650 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:21:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-14 16:21:08,650 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-14 16:21:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-14 16:21:08,651 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-14 16:21:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-14 16:21:08,651 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-14 16:21:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:21:08,651 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:21:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:21:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:21:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:21:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-14 16:21:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-14 16:21:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:21:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:21:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:21:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:21:08,653 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-14 16:21:08,653 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-14 16:21:08,731 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:21:08,733 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:21:09,314 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-14 16:21:09,314 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-14 16:21:09,370 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:21:09,382 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:21:09,382 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-12-14 16:21:09,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:21:09 BoogieIcfgContainer [2021-12-14 16:21:09,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:21:09,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:21:09,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:21:09,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:21:09,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:21:08" (1/3) ... [2021-12-14 16:21:09,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2983f239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:21:09, skipping insertion in model container [2021-12-14 16:21:09,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:08" (2/3) ... [2021-12-14 16:21:09,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2983f239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:21:09, skipping insertion in model container [2021-12-14 16:21:09,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:21:09" (3/3) ... [2021-12-14 16:21:09,393 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-1.c [2021-12-14 16:21:09,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:21:09,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:21:09,445 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:21:09,451 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 [2021-12-14 16:21:09,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:21:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-14 16:21:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:21:09,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:09,486 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] [2021-12-14 16:21:09,487 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:09,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2009342201, now seen corresponding path program 1 times [2021-12-14 16:21:09,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:09,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349748650] [2021-12-14 16:21:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:09,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:09,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:09,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:09,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:09,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:21:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:09,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:21:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:09,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:09,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349748650] [2021-12-14 16:21:09,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349748650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:09,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:09,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:21:09,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109090864] [2021-12-14 16:21:09,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:09,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:21:09,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:21:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:21:09,866 INFO L87 Difference]: Start difference. First operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:10,701 INFO L93 Difference]: Finished difference Result 1038 states and 1657 transitions. [2021-12-14 16:21:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:10,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:21:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:10,714 INFO L225 Difference]: With dead ends: 1038 [2021-12-14 16:21:10,714 INFO L226 Difference]: Without dead ends: 597 [2021-12-14 16:21:10,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:21:10,722 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1154 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:10,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 2065 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:21:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-12-14 16:21:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 558. [2021-12-14 16:21:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 479 states have (on average 1.524008350730689) internal successors, (730), 486 states have internal predecessors, (730), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (56), 52 states have call predecessors, (56), 51 states have call successors, (56) [2021-12-14 16:21:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 841 transitions. [2021-12-14 16:21:10,788 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 841 transitions. Word has length 65 [2021-12-14 16:21:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:10,788 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 841 transitions. [2021-12-14 16:21:10,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 841 transitions. [2021-12-14 16:21:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:21:10,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:10,792 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] [2021-12-14 16:21:10,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:21:10,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:10,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash -330453561, now seen corresponding path program 1 times [2021-12-14 16:21:10,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:10,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457860932] [2021-12-14 16:21:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:10,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:10,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:10,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:10,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:10,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:10,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:10,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:21:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:10,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:21:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:10,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:10,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457860932] [2021-12-14 16:21:10,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457860932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:10,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:10,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:21:10,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131366680] [2021-12-14 16:21:10,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:10,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:21:10,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:10,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:21:10,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:21:10,898 INFO L87 Difference]: Start difference. First operand 558 states and 841 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:11,894 INFO L93 Difference]: Finished difference Result 955 states and 1407 transitions. [2021-12-14 16:21:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:21:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:21:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:11,898 INFO L225 Difference]: With dead ends: 955 [2021-12-14 16:21:11,899 INFO L226 Difference]: Without dead ends: 746 [2021-12-14 16:21:11,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:21:11,901 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1326 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:11,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 2748 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:21:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-14 16:21:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 670. [2021-12-14 16:21:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 569 states have (on average 1.5043936731107206) internal successors, (856), 578 states have internal predecessors, (856), 68 states have call successors, (68), 29 states have call predecessors, (68), 31 states have return successors, (77), 66 states have call predecessors, (77), 64 states have call successors, (77) [2021-12-14 16:21:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1001 transitions. [2021-12-14 16:21:11,934 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1001 transitions. Word has length 65 [2021-12-14 16:21:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:11,934 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1001 transitions. [2021-12-14 16:21:11,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1001 transitions. [2021-12-14 16:21:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:21:11,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:11,937 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] [2021-12-14 16:21:11,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:21:11,938 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1935927625, now seen corresponding path program 1 times [2021-12-14 16:21:11,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:11,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524004021] [2021-12-14 16:21:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:11,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:11,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:11,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:12,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:12,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:12,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:12,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:21:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:12,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:21:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:12,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:12,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524004021] [2021-12-14 16:21:12,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524004021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:12,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:12,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:21:12,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418592769] [2021-12-14 16:21:12,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:12,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:21:12,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:21:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:21:12,038 INFO L87 Difference]: Start difference. First operand 670 states and 1001 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 16:21:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:13,614 INFO L93 Difference]: Finished difference Result 2216 states and 3199 transitions. [2021-12-14 16:21:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:21:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-14 16:21:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:13,622 INFO L225 Difference]: With dead ends: 2216 [2021-12-14 16:21:13,623 INFO L226 Difference]: Without dead ends: 1883 [2021-12-14 16:21:13,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:21:13,626 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 3975 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3993 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:13,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3993 Valid, 2670 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:21:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-12-14 16:21:13,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1723. [2021-12-14 16:21:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1417 states have (on average 1.4114326040931546) internal successors, (2000), 1441 states have internal predecessors, (2000), 178 states have call successors, (178), 112 states have call predecessors, (178), 126 states have return successors, (210), 172 states have call predecessors, (210), 174 states have call successors, (210) [2021-12-14 16:21:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2388 transitions. [2021-12-14 16:21:13,715 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2388 transitions. Word has length 65 [2021-12-14 16:21:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:13,715 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 2388 transitions. [2021-12-14 16:21:13,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 16:21:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2388 transitions. [2021-12-14 16:21:13,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:21:13,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:13,718 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] [2021-12-14 16:21:13,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:21:13,718 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1448069129, now seen corresponding path program 1 times [2021-12-14 16:21:13,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:13,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949841275] [2021-12-14 16:21:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:13,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:13,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:13,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:13,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:13,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:13,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:13,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 16:21:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:13,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:21:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:13,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:13,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949841275] [2021-12-14 16:21:13,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949841275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:13,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:13,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:21:13,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502929281] [2021-12-14 16:21:13,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:13,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:21:13,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:13,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:21:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:13,818 INFO L87 Difference]: Start difference. First operand 1723 states and 2388 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:14,656 INFO L93 Difference]: Finished difference Result 3251 states and 4467 transitions. [2021-12-14 16:21:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:21:14,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-14 16:21:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:14,662 INFO L225 Difference]: With dead ends: 3251 [2021-12-14 16:21:14,663 INFO L226 Difference]: Without dead ends: 1871 [2021-12-14 16:21:14,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:14,665 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 875 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:14,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 2883 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:21:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-12-14 16:21:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1763. [2021-12-14 16:21:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1449 states have (on average 1.3982056590752243) internal successors, (2026), 1473 states have internal predecessors, (2026), 178 states have call successors, (178), 112 states have call predecessors, (178), 134 states have return successors, (218), 180 states have call predecessors, (218), 174 states have call successors, (218) [2021-12-14 16:21:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2422 transitions. [2021-12-14 16:21:14,720 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2422 transitions. Word has length 66 [2021-12-14 16:21:14,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:14,720 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 2422 transitions. [2021-12-14 16:21:14,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2422 transitions. [2021-12-14 16:21:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:21:14,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:14,722 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] [2021-12-14 16:21:14,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:21:14,722 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:14,722 INFO L85 PathProgramCache]: Analyzing trace with hash 418709831, now seen corresponding path program 1 times [2021-12-14 16:21:14,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:14,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745317508] [2021-12-14 16:21:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:14,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:14,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:14,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:14,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:14,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:14,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 16:21:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:14,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:21:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:14,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:14,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745317508] [2021-12-14 16:21:14,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745317508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:14,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:14,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:21:14,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801279840] [2021-12-14 16:21:14,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:14,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:21:14,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:21:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:21:14,799 INFO L87 Difference]: Start difference. First operand 1763 states and 2422 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:21:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:16,350 INFO L93 Difference]: Finished difference Result 5335 states and 7296 transitions. [2021-12-14 16:21:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:21:16,350 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-14 16:21:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:16,358 INFO L225 Difference]: With dead ends: 5335 [2021-12-14 16:21:16,358 INFO L226 Difference]: Without dead ends: 2154 [2021-12-14 16:21:16,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:21:16,364 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 3628 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3646 SdHoareTripleChecker+Valid, 3099 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:16,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3646 Valid, 3099 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:21:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-12-14 16:21:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1974. [2021-12-14 16:21:16,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1588 states have (on average 1.3551637279596978) internal successors, (2152), 1614 states have internal predecessors, (2152), 218 states have call successors, (218), 140 states have call predecessors, (218), 166 states have return successors, (264), 222 states have call predecessors, (264), 214 states have call successors, (264) [2021-12-14 16:21:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2634 transitions. [2021-12-14 16:21:16,425 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2634 transitions. Word has length 66 [2021-12-14 16:21:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:16,426 INFO L470 AbstractCegarLoop]: Abstraction has 1974 states and 2634 transitions. [2021-12-14 16:21:16,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:21:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2634 transitions. [2021-12-14 16:21:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:21:16,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:16,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:16,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:21:16,428 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash -440043302, now seen corresponding path program 1 times [2021-12-14 16:21:16,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:16,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645208024] [2021-12-14 16:21:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:16,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:16,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:16,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:16,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:16,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:16,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:16,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:16,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:16,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:21:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:21:16,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:16,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645208024] [2021-12-14 16:21:16,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645208024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:16,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:16,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:21:16,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621708258] [2021-12-14 16:21:16,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:16,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:21:16,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:16,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:21:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:16,517 INFO L87 Difference]: Start difference. First operand 1974 states and 2634 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:17,368 INFO L93 Difference]: Finished difference Result 3799 states and 5036 transitions. [2021-12-14 16:21:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:21:17,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-14 16:21:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:17,394 INFO L225 Difference]: With dead ends: 3799 [2021-12-14 16:21:17,394 INFO L226 Difference]: Without dead ends: 2168 [2021-12-14 16:21:17,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:21:17,400 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 869 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 2820 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:17,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 2820 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:21:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-12-14 16:21:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2034. [2021-12-14 16:21:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1636 states have (on average 1.341075794621027) internal successors, (2194), 1662 states have internal predecessors, (2194), 218 states have call successors, (218), 140 states have call predecessors, (218), 178 states have return successors, (276), 234 states have call predecessors, (276), 214 states have call successors, (276) [2021-12-14 16:21:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2688 transitions. [2021-12-14 16:21:17,537 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2688 transitions. Word has length 91 [2021-12-14 16:21:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:17,539 INFO L470 AbstractCegarLoop]: Abstraction has 2034 states and 2688 transitions. [2021-12-14 16:21:17,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2688 transitions. [2021-12-14 16:21:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:21:17,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:17,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:17,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:21:17,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:17,545 INFO L85 PathProgramCache]: Analyzing trace with hash 3857372, now seen corresponding path program 1 times [2021-12-14 16:21:17,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:17,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001019710] [2021-12-14 16:21:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:17,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:17,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:17,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:17,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:17,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:17,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:17,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:17,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:17,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:21:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:21:17,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:17,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001019710] [2021-12-14 16:21:17,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001019710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:17,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:17,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:21:17,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336108670] [2021-12-14 16:21:17,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:17,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:21:17,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:17,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:21:17,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:21:17,707 INFO L87 Difference]: Start difference. First operand 2034 states and 2688 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:18,625 INFO L93 Difference]: Finished difference Result 3561 states and 4652 transitions. [2021-12-14 16:21:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:21:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-14 16:21:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:18,633 INFO L225 Difference]: With dead ends: 3561 [2021-12-14 16:21:18,633 INFO L226 Difference]: Without dead ends: 2108 [2021-12-14 16:21:18,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:21:18,637 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 1635 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:18,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1664 Valid, 2086 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:21:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-12-14 16:21:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1813. [2021-12-14 16:21:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1468 states have (on average 1.3460490463215258) internal successors, (1976), 1489 states have internal predecessors, (1976), 190 states have call successors, (190), 121 states have call predecessors, (190), 153 states have return successors, (236), 204 states have call predecessors, (236), 186 states have call successors, (236) [2021-12-14 16:21:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2402 transitions. [2021-12-14 16:21:18,688 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2402 transitions. Word has length 91 [2021-12-14 16:21:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:18,689 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2402 transitions. [2021-12-14 16:21:18,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2402 transitions. [2021-12-14 16:21:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:21:18,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:18,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:18,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:21:18,690 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1943019418, now seen corresponding path program 1 times [2021-12-14 16:21:18,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:18,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035675279] [2021-12-14 16:21:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:18,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:18,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:18,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:18,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:21:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:21:18,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:18,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035675279] [2021-12-14 16:21:18,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035675279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:18,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:18,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:18,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275614588] [2021-12-14 16:21:18,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:18,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:18,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:18,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:18,773 INFO L87 Difference]: Start difference. First operand 1813 states and 2402 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:21:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:19,191 INFO L93 Difference]: Finished difference Result 4965 states and 6514 transitions. [2021-12-14 16:21:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:21:19,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-14 16:21:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:19,206 INFO L225 Difference]: With dead ends: 4965 [2021-12-14 16:21:19,206 INFO L226 Difference]: Without dead ends: 3496 [2021-12-14 16:21:19,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:21:19,211 INFO L933 BasicCegarLoop]: 689 mSDtfsCounter, 1867 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:19,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1899 Valid, 1406 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:21:19,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-12-14 16:21:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3282. [2021-12-14 16:21:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 2617 states have (on average 1.3007260221627819) internal successors, (3404), 2667 states have internal predecessors, (3404), 351 states have call successors, (351), 234 states have call predecessors, (351), 312 states have return successors, (519), 383 states have call predecessors, (519), 347 states have call successors, (519) [2021-12-14 16:21:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 4274 transitions. [2021-12-14 16:21:19,333 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 4274 transitions. Word has length 91 [2021-12-14 16:21:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:19,333 INFO L470 AbstractCegarLoop]: Abstraction has 3282 states and 4274 transitions. [2021-12-14 16:21:19,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:21:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 4274 transitions. [2021-12-14 16:21:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:21:19,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:19,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:19,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:21:19,336 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 885181340, now seen corresponding path program 1 times [2021-12-14 16:21:19,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:19,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752515411] [2021-12-14 16:21:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:19,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:21:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:21:19,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:19,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752515411] [2021-12-14 16:21:19,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752515411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:19,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:19,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:21:19,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041843676] [2021-12-14 16:21:19,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:19,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:21:19,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:21:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:21:19,396 INFO L87 Difference]: Start difference. First operand 3282 states and 4274 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:19,835 INFO L93 Difference]: Finished difference Result 4866 states and 6258 transitions. [2021-12-14 16:21:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:21:19,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-14 16:21:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:19,842 INFO L225 Difference]: With dead ends: 4866 [2021-12-14 16:21:19,843 INFO L226 Difference]: Without dead ends: 1928 [2021-12-14 16:21:19,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:19,849 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 698 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:19,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 1858 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:21:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-12-14 16:21:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1813. [2021-12-14 16:21:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1468 states have (on average 1.3208446866485013) internal successors, (1939), 1489 states have internal predecessors, (1939), 190 states have call successors, (190), 121 states have call predecessors, (190), 153 states have return successors, (236), 204 states have call predecessors, (236), 186 states have call successors, (236) [2021-12-14 16:21:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2365 transitions. [2021-12-14 16:21:19,934 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2365 transitions. Word has length 91 [2021-12-14 16:21:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:19,934 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2365 transitions. [2021-12-14 16:21:19,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2365 transitions. [2021-12-14 16:21:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 16:21:19,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:19,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:19,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:21:19,936 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1161498813, now seen corresponding path program 1 times [2021-12-14 16:21:19,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:19,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52435502] [2021-12-14 16:21:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:19,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:19,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:20,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:20,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:20,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:20,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:20,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 16:21:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:21:20,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:20,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52435502] [2021-12-14 16:21:20,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52435502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:20,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:20,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:21:20,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346821745] [2021-12-14 16:21:20,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:20,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:21:20,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:20,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:21:20,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:20,022 INFO L87 Difference]: Start difference. First operand 1813 states and 2365 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:21:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:21,162 INFO L93 Difference]: Finished difference Result 4231 states and 5448 transitions. [2021-12-14 16:21:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 16:21:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-14 16:21:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:21,171 INFO L225 Difference]: With dead ends: 4231 [2021-12-14 16:21:21,171 INFO L226 Difference]: Without dead ends: 2611 [2021-12-14 16:21:21,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-14 16:21:21,175 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 2341 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2382 SdHoareTripleChecker+Valid, 2462 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:21,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2382 Valid, 2462 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:21:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-12-14 16:21:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2434. [2021-12-14 16:21:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 1935 states have (on average 1.2821705426356589) internal successors, (2481), 1964 states have internal predecessors, (2481), 267 states have call successors, (267), 169 states have call predecessors, (267), 230 states have return successors, (367), 302 states have call predecessors, (367), 263 states have call successors, (367) [2021-12-14 16:21:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3115 transitions. [2021-12-14 16:21:21,250 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3115 transitions. Word has length 92 [2021-12-14 16:21:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:21,252 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 3115 transitions. [2021-12-14 16:21:21,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:21:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3115 transitions. [2021-12-14 16:21:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 16:21:21,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:21,254 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:21,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:21:21,255 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash 173734590, now seen corresponding path program 1 times [2021-12-14 16:21:21,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:21,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718013790] [2021-12-14 16:21:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:21,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 16:21:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:21:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 16:21:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 16:21:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:21:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:21:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-14 16:21:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-14 16:21:21,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:21,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718013790] [2021-12-14 16:21:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718013790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:21:21,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329948009] [2021-12-14 16:21:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:21,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:21:21,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:21:21,377 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) [2021-12-14 16:21:21,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:21:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:21:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:21:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 16:21:21,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:21:21,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329948009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:21,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:21:21,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-14 16:21:21,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140462964] [2021-12-14 16:21:21,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:21,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:21:21,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:21,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:21:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:21,806 INFO L87 Difference]: Start difference. First operand 2434 states and 3115 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:21:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:21,917 INFO L93 Difference]: Finished difference Result 6360 states and 7944 transitions. [2021-12-14 16:21:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:21:21,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2021-12-14 16:21:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:21,932 INFO L225 Difference]: With dead ends: 6360 [2021-12-14 16:21:21,932 INFO L226 Difference]: Without dead ends: 4346 [2021-12-14 16:21:21,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:21,937 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 61 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:21,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1331 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:21:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-12-14 16:21:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4304. [2021-12-14 16:21:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.2485259433962264) internal successors, (4235), 3444 states have internal predecessors, (4235), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2021-12-14 16:21:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5344 transitions. [2021-12-14 16:21:22,071 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5344 transitions. Word has length 163 [2021-12-14 16:21:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:22,072 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 5344 transitions. [2021-12-14 16:21:22,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:21:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5344 transitions. [2021-12-14 16:21:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:22,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:22,075 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] [2021-12-14 16:21:22,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 16:21:22,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 16:21:22,315 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2058139820, now seen corresponding path program 1 times [2021-12-14 16:21:22,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:22,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662130411] [2021-12-14 16:21:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:22,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:22,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:22,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:22,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:22,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:22,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:22,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662130411] [2021-12-14 16:21:22,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662130411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:22,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:22,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:21:22,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701832066] [2021-12-14 16:21:22,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:22,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:21:22,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:22,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:21:22,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:21:22,408 INFO L87 Difference]: Start difference. First operand 4304 states and 5344 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-14 16:21:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:23,634 INFO L93 Difference]: Finished difference Result 4751 states and 6066 transitions. [2021-12-14 16:21:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:23,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:23,648 INFO L225 Difference]: With dead ends: 4751 [2021-12-14 16:21:23,649 INFO L226 Difference]: Without dead ends: 4424 [2021-12-14 16:21:23,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:23,651 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 1003 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:23,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1300 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:21:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-12-14 16:21:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4304. [2021-12-14 16:21:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.2482311320754718) internal successors, (4234), 3444 states have internal predecessors, (4234), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2021-12-14 16:21:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5343 transitions. [2021-12-14 16:21:23,895 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5343 transitions. Word has length 157 [2021-12-14 16:21:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:23,895 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 5343 transitions. [2021-12-14 16:21:23,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-14 16:21:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5343 transitions. [2021-12-14 16:21:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:23,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:23,904 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] [2021-12-14 16:21:23,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:21:23,904 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1972179986, now seen corresponding path program 1 times [2021-12-14 16:21:23,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:23,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426544379] [2021-12-14 16:21:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:23,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:24,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:24,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426544379] [2021-12-14 16:21:24,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426544379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:24,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:24,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:21:24,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803233852] [2021-12-14 16:21:24,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:24,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:21:24,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:21:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:21:24,020 INFO L87 Difference]: Start difference. First operand 4304 states and 5343 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-14 16:21:25,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:25,470 INFO L93 Difference]: Finished difference Result 4743 states and 6049 transitions. [2021-12-14 16:21:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:25,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:25,487 INFO L225 Difference]: With dead ends: 4743 [2021-12-14 16:21:25,488 INFO L226 Difference]: Without dead ends: 4424 [2021-12-14 16:21:25,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:25,490 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 994 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:25,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1298 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:21:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-12-14 16:21:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4304. [2021-12-14 16:21:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.247936320754717) internal successors, (4233), 3444 states have internal predecessors, (4233), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2021-12-14 16:21:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5342 transitions. [2021-12-14 16:21:25,684 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5342 transitions. Word has length 157 [2021-12-14 16:21:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:25,685 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 5342 transitions. [2021-12-14 16:21:25,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-14 16:21:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5342 transitions. [2021-12-14 16:21:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:25,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:25,686 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] [2021-12-14 16:21:25,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:21:25,687 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1912176944, now seen corresponding path program 1 times [2021-12-14 16:21:25,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:25,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184593954] [2021-12-14 16:21:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:25,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:25,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:25,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:25,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:25,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:25,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:25,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:25,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184593954] [2021-12-14 16:21:25,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184593954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:25,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:25,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:21:25,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92623845] [2021-12-14 16:21:25,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:25,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:21:25,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:21:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:21:25,794 INFO L87 Difference]: Start difference. First operand 4304 states and 5342 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2021-12-14 16:21:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:27,938 INFO L93 Difference]: Finished difference Result 5190 states and 6773 transitions. [2021-12-14 16:21:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:21:27,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:27,954 INFO L225 Difference]: With dead ends: 5190 [2021-12-14 16:21:27,954 INFO L226 Difference]: Without dead ends: 4874 [2021-12-14 16:21:27,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:27,956 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1579 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:27,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1608 Valid, 1838 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 16:21:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2021-12-14 16:21:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4633. [2021-12-14 16:21:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 3695 states have (on average 1.2765899864682002) internal successors, (4717), 3748 states have internal predecessors, (4717), 493 states have call successors, (493), 336 states have call predecessors, (493), 443 states have return successors, (657), 550 states have call predecessors, (657), 489 states have call successors, (657) [2021-12-14 16:21:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 5867 transitions. [2021-12-14 16:21:28,178 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 5867 transitions. Word has length 157 [2021-12-14 16:21:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:28,178 INFO L470 AbstractCegarLoop]: Abstraction has 4633 states and 5867 transitions. [2021-12-14 16:21:28,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2021-12-14 16:21:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 5867 transitions. [2021-12-14 16:21:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:28,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:28,180 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] [2021-12-14 16:21:28,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:21:28,181 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:28,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1716755156, now seen corresponding path program 1 times [2021-12-14 16:21:28,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:28,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622262324] [2021-12-14 16:21:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:28,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:28,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:28,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622262324] [2021-12-14 16:21:28,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622262324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:28,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:28,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:28,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9392837] [2021-12-14 16:21:28,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:28,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:28,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:28,290 INFO L87 Difference]: Start difference. First operand 4633 states and 5867 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:30,747 INFO L93 Difference]: Finished difference Result 5983 states and 8049 transitions. [2021-12-14 16:21:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:30,757 INFO L225 Difference]: With dead ends: 5983 [2021-12-14 16:21:30,757 INFO L226 Difference]: Without dead ends: 5338 [2021-12-14 16:21:30,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:30,760 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 1687 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 2701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:30,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1716 Valid, 2256 Invalid, 2701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 16:21:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-12-14 16:21:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4939. [2021-12-14 16:21:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3975 states have (on average 1.2968553459119496) internal successors, (5155), 4029 states have internal predecessors, (5155), 512 states have call successors, (512), 342 states have call predecessors, (512), 450 states have return successors, (678), 570 states have call predecessors, (678), 508 states have call successors, (678) [2021-12-14 16:21:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6345 transitions. [2021-12-14 16:21:31,009 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6345 transitions. Word has length 157 [2021-12-14 16:21:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:31,009 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 6345 transitions. [2021-12-14 16:21:31,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6345 transitions. [2021-12-14 16:21:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:31,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:31,011 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] [2021-12-14 16:21:31,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:21:31,012 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash -317801554, now seen corresponding path program 1 times [2021-12-14 16:21:31,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:31,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509471042] [2021-12-14 16:21:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:31,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:31,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509471042] [2021-12-14 16:21:31,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509471042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:31,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:31,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:31,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001157112] [2021-12-14 16:21:31,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:31,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:31,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:31,122 INFO L87 Difference]: Start difference. First operand 4939 states and 6345 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:32,650 INFO L93 Difference]: Finished difference Result 6303 states and 8563 transitions. [2021-12-14 16:21:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:32,661 INFO L225 Difference]: With dead ends: 6303 [2021-12-14 16:21:32,662 INFO L226 Difference]: Without dead ends: 5352 [2021-12-14 16:21:32,665 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 [2021-12-14 16:21:32,665 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 1207 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:32,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 1769 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:21:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5352 states. [2021-12-14 16:21:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5352 to 4939. [2021-12-14 16:21:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3975 states have (on average 1.2961006289308177) internal successors, (5152), 4029 states have internal predecessors, (5152), 512 states have call successors, (512), 342 states have call predecessors, (512), 450 states have return successors, (678), 570 states have call predecessors, (678), 508 states have call successors, (678) [2021-12-14 16:21:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6342 transitions. [2021-12-14 16:21:32,907 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6342 transitions. Word has length 157 [2021-12-14 16:21:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:32,908 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 6342 transitions. [2021-12-14 16:21:32,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6342 transitions. [2021-12-14 16:21:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:32,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:32,910 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] [2021-12-14 16:21:32,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:21:32,910 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1935242004, now seen corresponding path program 1 times [2021-12-14 16:21:32,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:32,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714857350] [2021-12-14 16:21:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:32,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:33,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:33,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714857350] [2021-12-14 16:21:33,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714857350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:33,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:33,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:33,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628726270] [2021-12-14 16:21:33,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:33,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:33,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:33,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:33,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:33,022 INFO L87 Difference]: Start difference. First operand 4939 states and 6342 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:34,177 INFO L93 Difference]: Finished difference Result 6299 states and 8547 transitions. [2021-12-14 16:21:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:34,190 INFO L225 Difference]: With dead ends: 6299 [2021-12-14 16:21:34,191 INFO L226 Difference]: Without dead ends: 5348 [2021-12-14 16:21:34,193 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 [2021-12-14 16:21:34,193 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 1404 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:34,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1434 Valid, 1529 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:21:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2021-12-14 16:21:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 4939. [2021-12-14 16:21:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3975 states have (on average 1.2953459119496855) internal successors, (5149), 4029 states have internal predecessors, (5149), 512 states have call successors, (512), 342 states have call predecessors, (512), 450 states have return successors, (678), 570 states have call predecessors, (678), 508 states have call successors, (678) [2021-12-14 16:21:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6339 transitions. [2021-12-14 16:21:34,474 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6339 transitions. Word has length 157 [2021-12-14 16:21:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:34,475 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 6339 transitions. [2021-12-14 16:21:34,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6339 transitions. [2021-12-14 16:21:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:34,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:34,481 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] [2021-12-14 16:21:34,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:21:34,481 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:34,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1571775506, now seen corresponding path program 1 times [2021-12-14 16:21:34,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:34,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591262567] [2021-12-14 16:21:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:34,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:34,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:34,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591262567] [2021-12-14 16:21:34,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591262567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:34,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:34,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:34,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091889481] [2021-12-14 16:21:34,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:34,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:34,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:34,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:34,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:34,573 INFO L87 Difference]: Start difference. First operand 4939 states and 6339 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:36,008 INFO L93 Difference]: Finished difference Result 6294 states and 8529 transitions. [2021-12-14 16:21:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:36,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:36,018 INFO L225 Difference]: With dead ends: 6294 [2021-12-14 16:21:36,019 INFO L226 Difference]: Without dead ends: 5343 [2021-12-14 16:21:36,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:36,022 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 1203 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:36,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1233 Valid, 1761 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:21:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2021-12-14 16:21:36,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 4939. [2021-12-14 16:21:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3975 states have (on average 1.2945911949685533) internal successors, (5146), 4029 states have internal predecessors, (5146), 512 states have call successors, (512), 342 states have call predecessors, (512), 450 states have return successors, (678), 570 states have call predecessors, (678), 508 states have call successors, (678) [2021-12-14 16:21:36,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6336 transitions. [2021-12-14 16:21:36,275 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6336 transitions. Word has length 157 [2021-12-14 16:21:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:36,276 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 6336 transitions. [2021-12-14 16:21:36,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6336 transitions. [2021-12-14 16:21:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:36,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:36,278 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] [2021-12-14 16:21:36,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:21:36,278 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:36,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1282956116, now seen corresponding path program 1 times [2021-12-14 16:21:36,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:36,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075301404] [2021-12-14 16:21:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:36,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:36,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:36,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075301404] [2021-12-14 16:21:36,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075301404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:36,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:36,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:36,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832447403] [2021-12-14 16:21:36,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:36,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:36,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:36,374 INFO L87 Difference]: Start difference. First operand 4939 states and 6336 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:39,162 INFO L93 Difference]: Finished difference Result 7135 states and 9845 transitions. [2021-12-14 16:21:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:39,180 INFO L225 Difference]: With dead ends: 7135 [2021-12-14 16:21:39,180 INFO L226 Difference]: Without dead ends: 6184 [2021-12-14 16:21:39,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:39,187 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 1583 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 2767 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:39,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1612 Valid, 2982 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2767 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 16:21:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6184 states. [2021-12-14 16:21:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6184 to 5558. [2021-12-14 16:21:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 4542 states have (on average 1.326728313518274) internal successors, (6026), 4598 states have internal predecessors, (6026), 550 states have call successors, (550), 354 states have call predecessors, (550), 464 states have return successors, (724), 610 states have call predecessors, (724), 546 states have call successors, (724) [2021-12-14 16:21:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 7300 transitions. [2021-12-14 16:21:39,491 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 7300 transitions. Word has length 157 [2021-12-14 16:21:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:39,491 INFO L470 AbstractCegarLoop]: Abstraction has 5558 states and 7300 transitions. [2021-12-14 16:21:39,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 7300 transitions. [2021-12-14 16:21:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:39,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:39,493 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] [2021-12-14 16:21:39,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:21:39,494 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:39,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1827828690, now seen corresponding path program 1 times [2021-12-14 16:21:39,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:39,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133430442] [2021-12-14 16:21:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:39,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:39,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133430442] [2021-12-14 16:21:39,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133430442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:39,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:39,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:39,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762979383] [2021-12-14 16:21:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:39,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:39,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:39,590 INFO L87 Difference]: Start difference. First operand 5558 states and 7300 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:42,208 INFO L93 Difference]: Finished difference Result 9376 states and 13373 transitions. [2021-12-14 16:21:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:42,228 INFO L225 Difference]: With dead ends: 9376 [2021-12-14 16:21:42,229 INFO L226 Difference]: Without dead ends: 7806 [2021-12-14 16:21:42,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:42,236 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 1573 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:42,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1602 Valid, 2972 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2750 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 16:21:42,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-12-14 16:21:42,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 6797. [2021-12-14 16:21:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6797 states, 5677 states have (on average 1.3714990311784394) internal successors, (7786), 5737 states have internal predecessors, (7786), 626 states have call successors, (626), 378 states have call predecessors, (626), 492 states have return successors, (822), 690 states have call predecessors, (822), 622 states have call successors, (822) [2021-12-14 16:21:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6797 states to 6797 states and 9234 transitions. [2021-12-14 16:21:42,570 INFO L78 Accepts]: Start accepts. Automaton has 6797 states and 9234 transitions. Word has length 157 [2021-12-14 16:21:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:42,570 INFO L470 AbstractCegarLoop]: Abstraction has 6797 states and 9234 transitions. [2021-12-14 16:21:42,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6797 states and 9234 transitions. [2021-12-14 16:21:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:42,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:42,573 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] [2021-12-14 16:21:42,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:21:42,574 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:42,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:42,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1519086640, now seen corresponding path program 1 times [2021-12-14 16:21:42,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:42,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292752675] [2021-12-14 16:21:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:42,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:42,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:42,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292752675] [2021-12-14 16:21:42,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292752675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:42,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:42,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:42,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200038433] [2021-12-14 16:21:42,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:42,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:42,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:42,677 INFO L87 Difference]: Start difference. First operand 6797 states and 9234 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:44,088 INFO L93 Difference]: Finished difference Result 10627 states and 15359 transitions. [2021-12-14 16:21:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:44,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:44,109 INFO L225 Difference]: With dead ends: 10627 [2021-12-14 16:21:44,110 INFO L226 Difference]: Without dead ends: 7818 [2021-12-14 16:21:44,119 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 [2021-12-14 16:21:44,119 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 1403 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:44,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 1510 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:21:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7818 states. [2021-12-14 16:21:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7818 to 6797. [2021-12-14 16:21:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6797 states, 5677 states have (on average 1.369913686806412) internal successors, (7777), 5737 states have internal predecessors, (7777), 626 states have call successors, (626), 378 states have call predecessors, (626), 492 states have return successors, (822), 690 states have call predecessors, (822), 622 states have call successors, (822) [2021-12-14 16:21:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6797 states to 6797 states and 9225 transitions. [2021-12-14 16:21:44,514 INFO L78 Accepts]: Start accepts. Automaton has 6797 states and 9225 transitions. Word has length 157 [2021-12-14 16:21:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:44,514 INFO L470 AbstractCegarLoop]: Abstraction has 6797 states and 9225 transitions. [2021-12-14 16:21:44,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 6797 states and 9225 transitions. [2021-12-14 16:21:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:44,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:44,517 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] [2021-12-14 16:21:44,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:21:44,517 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:44,518 INFO L85 PathProgramCache]: Analyzing trace with hash 934314990, now seen corresponding path program 1 times [2021-12-14 16:21:44,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:44,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566104349] [2021-12-14 16:21:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:44,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:44,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:44,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566104349] [2021-12-14 16:21:44,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566104349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:44,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:44,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:44,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168364435] [2021-12-14 16:21:44,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:44,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:44,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:44,612 INFO L87 Difference]: Start difference. First operand 6797 states and 9225 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:47,361 INFO L93 Difference]: Finished difference Result 13853 states and 20389 transitions. [2021-12-14 16:21:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:47,391 INFO L225 Difference]: With dead ends: 13853 [2021-12-14 16:21:47,391 INFO L226 Difference]: Without dead ends: 11044 [2021-12-14 16:21:47,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:47,402 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 1653 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:47,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 2165 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 16:21:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11044 states. [2021-12-14 16:21:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11044 to 9289. [2021-12-14 16:21:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9289 states, 7961 states have (on average 1.4200477326968974) internal successors, (11305), 8029 states have internal predecessors, (11305), 778 states have call successors, (778), 426 states have call predecessors, (778), 548 states have return successors, (1036), 850 states have call predecessors, (1036), 774 states have call successors, (1036) [2021-12-14 16:21:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9289 states to 9289 states and 13119 transitions. [2021-12-14 16:21:47,967 INFO L78 Accepts]: Start accepts. Automaton has 9289 states and 13119 transitions. Word has length 157 [2021-12-14 16:21:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:47,967 INFO L470 AbstractCegarLoop]: Abstraction has 9289 states and 13119 transitions. [2021-12-14 16:21:47,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 9289 states and 13119 transitions. [2021-12-14 16:21:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:47,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:47,972 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] [2021-12-14 16:21:47,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:21:47,972 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash 499809392, now seen corresponding path program 1 times [2021-12-14 16:21:47,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:47,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317074072] [2021-12-14 16:21:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:47,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:48,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:48,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317074072] [2021-12-14 16:21:48,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317074072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:48,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:48,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:48,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897245837] [2021-12-14 16:21:48,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:48,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:48,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:48,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:48,083 INFO L87 Difference]: Start difference. First operand 9289 states and 13119 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:51,257 INFO L93 Difference]: Finished difference Result 22827 states and 34561 transitions. [2021-12-14 16:21:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:51,298 INFO L225 Difference]: With dead ends: 22827 [2021-12-14 16:21:51,299 INFO L226 Difference]: Without dead ends: 17526 [2021-12-14 16:21:51,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:51,313 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 1564 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:51,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 2956 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 16:21:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17526 states. [2021-12-14 16:21:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17526 to 14286. [2021-12-14 16:21:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14286 states, 12542 states have (on average 1.4653962685377133) internal successors, (18379), 12626 states have internal predecessors, (18379), 1082 states have call successors, (1082), 522 states have call predecessors, (1082), 660 states have return successors, (1518), 1170 states have call predecessors, (1518), 1078 states have call successors, (1518) [2021-12-14 16:21:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14286 states to 14286 states and 20979 transitions. [2021-12-14 16:21:52,098 INFO L78 Accepts]: Start accepts. Automaton has 14286 states and 20979 transitions. Word has length 157 [2021-12-14 16:21:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:52,098 INFO L470 AbstractCegarLoop]: Abstraction has 14286 states and 20979 transitions. [2021-12-14 16:21:52,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 14286 states and 20979 transitions. [2021-12-14 16:21:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:52,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:52,104 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] [2021-12-14 16:21:52,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:21:52,104 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:52,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash 70151086, now seen corresponding path program 1 times [2021-12-14 16:21:52,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:52,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842379638] [2021-12-14 16:21:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:52,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:52,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842379638] [2021-12-14 16:21:52,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842379638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:52,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:52,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:52,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186828609] [2021-12-14 16:21:52,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:52,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:52,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:52,196 INFO L87 Difference]: Start difference. First operand 14286 states and 20979 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:56,963 INFO L93 Difference]: Finished difference Result 45542 states and 70393 transitions. [2021-12-14 16:21:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:21:56,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:21:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:57,059 INFO L225 Difference]: With dead ends: 45542 [2021-12-14 16:21:57,059 INFO L226 Difference]: Without dead ends: 35244 [2021-12-14 16:21:57,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:21:57,084 INFO L933 BasicCegarLoop]: 1124 mSDtfsCounter, 1666 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 3186 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 3109 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 3186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:57,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1694 Valid, 3109 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 3186 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 16:21:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35244 states. [2021-12-14 16:21:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35244 to 24215. [2021-12-14 16:21:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24215 states, 21671 states have (on average 1.500115361543076) internal successors, (32509), 21787 states have internal predecessors, (32509), 1658 states have call successors, (1658), 714 states have call predecessors, (1658), 884 states have return successors, (2612), 1778 states have call predecessors, (2612), 1654 states have call successors, (2612) [2021-12-14 16:21:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24215 states to 24215 states and 36779 transitions. [2021-12-14 16:21:58,497 INFO L78 Accepts]: Start accepts. Automaton has 24215 states and 36779 transitions. Word has length 157 [2021-12-14 16:21:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:58,497 INFO L470 AbstractCegarLoop]: Abstraction has 24215 states and 36779 transitions. [2021-12-14 16:21:58,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:21:58,498 INFO L276 IsEmpty]: Start isEmpty. Operand 24215 states and 36779 transitions. [2021-12-14 16:21:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:21:58,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:58,507 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] [2021-12-14 16:21:58,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 16:21:58,508 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash -636445520, now seen corresponding path program 1 times [2021-12-14 16:21:58,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:58,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798618089] [2021-12-14 16:21:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:58,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:21:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:21:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:21:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:58,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:58,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798618089] [2021-12-14 16:21:58,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798618089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:58,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:58,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:58,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33553083] [2021-12-14 16:21:58,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:58,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:58,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:58,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:58,586 INFO L87 Difference]: Start difference. First operand 24215 states and 36779 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:22:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:05,548 INFO L93 Difference]: Finished difference Result 85149 states and 133759 transitions. [2021-12-14 16:22:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:22:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-14 16:22:05,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:05,750 INFO L225 Difference]: With dead ends: 85149 [2021-12-14 16:22:05,750 INFO L226 Difference]: Without dead ends: 64922 [2021-12-14 16:22:05,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:22:05,805 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 1930 mSDsluCounter, 1982 mSDsCounter, 0 mSdLazyCounter, 2691 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 2932 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:05,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1970 Valid, 2932 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2691 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 16:22:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64922 states. [2021-12-14 16:22:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64922 to 43400. [2021-12-14 16:22:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43400 states, 39288 states have (on average 1.5181989411525147) internal successors, (59647), 39468 states have internal predecessors, (59647), 2778 states have call successors, (2778), 1098 states have call predecessors, (2778), 1332 states have return successors, (5254), 2962 states have call predecessors, (5254), 2774 states have call successors, (5254) [2021-12-14 16:22:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43400 states to 43400 states and 67679 transitions. [2021-12-14 16:22:09,301 INFO L78 Accepts]: Start accepts. Automaton has 43400 states and 67679 transitions. Word has length 157 [2021-12-14 16:22:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:09,302 INFO L470 AbstractCegarLoop]: Abstraction has 43400 states and 67679 transitions. [2021-12-14 16:22:09,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-12-14 16:22:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 43400 states and 67679 transitions. [2021-12-14 16:22:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 16:22:09,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:09,316 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] [2021-12-14 16:22:09,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 16:22:09,316 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:09,317 INFO L85 PathProgramCache]: Analyzing trace with hash 310592366, now seen corresponding path program 1 times [2021-12-14 16:22:09,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:09,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760049832] [2021-12-14 16:22:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:09,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:22:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:22:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:22:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:22:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:09,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:09,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760049832] [2021-12-14 16:22:09,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760049832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:09,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:09,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:09,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182276339] [2021-12-14 16:22:09,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:09,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:09,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:09,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:09,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:09,411 INFO L87 Difference]: Start difference. First operand 43400 states and 67679 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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)