./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.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 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:32:08,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:32:08,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:32:08,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:32:08,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:32:08,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:32:08,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:32:08,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:32:08,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:32:08,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:32:08,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:32:08,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:32:08,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:32:08,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:32:08,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:32:08,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:32:08,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:32:08,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:32:08,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:32:08,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:32:08,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:32:08,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:32:08,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:32:08,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:32:08,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:32:08,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:32:08,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:32:08,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:32:08,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:32:08,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:32:08,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:32:08,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:32:08,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:32:08,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:32:08,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:32:08,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:32:08,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:32:08,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:32:08,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:32:08,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:32:08,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:32:08,306 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:32:08,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:32:08,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:32:08,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:32:08,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:32:08,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:32:08,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:32:08,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:32:08,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:32:08,339 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:32:08,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:32:08,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:32:08,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:32:08,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:32:08,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:32:08,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:32:08,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:32:08,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:32:08,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:32:08,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:32:08,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:32:08,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:32:08,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:32:08,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:32:08,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:32:08,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:32:08,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:32:08,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:32:08,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:32:08,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:32:08,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:32:08,352 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:32:08,352 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:32:08,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:32:08,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 [2021-12-28 02:32:08,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:32:08,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:32:08,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:32:08,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:32:08,721 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:32:08,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2021-12-28 02:32:08,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e5095082/c7f0f60a3c914d0ba29c773d09a66c7f/FLAGa90f5b9b7 [2021-12-28 02:32:09,264 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:32:09,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2021-12-28 02:32:09,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e5095082/c7f0f60a3c914d0ba29c773d09a66c7f/FLAGa90f5b9b7 [2021-12-28 02:32:09,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e5095082/c7f0f60a3c914d0ba29c773d09a66c7f [2021-12-28 02:32:09,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:32:09,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:32:09,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:32:09,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:32:09,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:32:09,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:32:09" (1/1) ... [2021-12-28 02:32:09,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779b0e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:09, skipping insertion in model container [2021-12-28 02:32:09,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:32:09" (1/1) ... [2021-12-28 02:32:09,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:32:09,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:32:09,958 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2021-12-28 02:32:10,066 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2021-12-28 02:32:10,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:32:10,127 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:32:10,141 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2021-12-28 02:32:10,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2021-12-28 02:32:10,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:32:10,245 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:32:10,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10 WrapperNode [2021-12-28 02:32:10,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:32:10,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:32:10,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:32:10,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:32:10,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,332 INFO L137 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 697 [2021-12-28 02:32:10,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:32:10,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:32:10,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:32:10,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:32:10,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:32:10,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:32:10,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:32:10,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:32:10,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (1/1) ... [2021-12-28 02:32:10,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:32:10,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:10,445 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) [2021-12-28 02:32:10,473 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 [2021-12-28 02:32:10,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:32:10,488 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:32:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:32:10,488 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:32:10,489 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:32:10,489 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:32:10,489 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:32:10,489 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:32:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:32:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:32:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:32:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:32:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:32:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:32:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:32:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:32:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:32:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:32:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:32:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:32:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:32:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:32:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:32:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:32:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:32:10,492 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:32:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:32:10,492 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:32:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:32:10,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:32:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:32:10,498 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:32:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:32:10,499 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:32:10,608 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:32:10,625 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:32:11,259 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:32:11,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:32:11,273 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-28 02:32:11,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:32:11 BoogieIcfgContainer [2021-12-28 02:32:11,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:32:11,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:32:11,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:32:11,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:32:11,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:32:09" (1/3) ... [2021-12-28 02:32:11,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f42fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:32:11, skipping insertion in model container [2021-12-28 02:32:11,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:10" (2/3) ... [2021-12-28 02:32:11,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f42fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:32:11, skipping insertion in model container [2021-12-28 02:32:11,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:32:11" (3/3) ... [2021-12-28 02:32:11,287 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2021-12-28 02:32:11,292 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:32:11,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:32:11,341 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:32:11,346 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 [2021-12-28 02:32:11,347 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:32:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 341 states, 287 states have (on average 1.613240418118467) internal successors, (463), 295 states have internal predecessors, (463), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-28 02:32:11,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:32:11,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:11,376 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] [2021-12-28 02:32:11,376 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:11,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1403683270, now seen corresponding path program 1 times [2021-12-28 02:32:11,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:11,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44893693] [2021-12-28 02:32:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:11,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:11,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:11,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44893693] [2021-12-28 02:32:11,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44893693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:11,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:11,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:32:11,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85121706] [2021-12-28 02:32:11,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:11,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:32:11,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:11,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:32:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:11,824 INFO L87 Difference]: Start difference. First operand has 341 states, 287 states have (on average 1.613240418118467) internal successors, (463), 295 states have internal predecessors, (463), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) 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) [2021-12-28 02:32:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:12,733 INFO L93 Difference]: Finished difference Result 794 states and 1240 transitions. [2021-12-28 02:32:12,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:32:12,735 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 [2021-12-28 02:32:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:12,748 INFO L225 Difference]: With dead ends: 794 [2021-12-28 02:32:12,748 INFO L226 Difference]: Without dead ends: 465 [2021-12-28 02:32:12,753 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 [2021-12-28 02:32:12,756 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 833 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:12,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 1506 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:32:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-28 02:32:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 426. [2021-12-28 02:32:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 355 states have (on average 1.4929577464788732) internal successors, (530), 362 states have internal predecessors, (530), 47 states have call successors, (47), 22 states have call predecessors, (47), 22 states have return successors, (48), 44 states have call predecessors, (48), 43 states have call successors, (48) [2021-12-28 02:32:12,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 625 transitions. [2021-12-28 02:32:12,837 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 625 transitions. Word has length 65 [2021-12-28 02:32:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:12,837 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 625 transitions. [2021-12-28 02:32:12,838 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) [2021-12-28 02:32:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 625 transitions. [2021-12-28 02:32:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:32:12,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:12,842 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] [2021-12-28 02:32:12,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:32:12,842 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1666920611, now seen corresponding path program 1 times [2021-12-28 02:32:12,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:12,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952163630] [2021-12-28 02:32:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:12,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:12,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:12,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:12,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:12,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:12,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:12,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:12,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:12,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952163630] [2021-12-28 02:32:12,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952163630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:12,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:12,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:32:12,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832832215] [2021-12-28 02:32:12,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:12,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:32:12,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:32:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:12,954 INFO L87 Difference]: Start difference. First operand 426 states and 625 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) [2021-12-28 02:32:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:13,865 INFO L93 Difference]: Finished difference Result 773 states and 1102 transitions. [2021-12-28 02:32:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:32:13,866 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 [2021-12-28 02:32:13,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:13,873 INFO L225 Difference]: With dead ends: 773 [2021-12-28 02:32:13,873 INFO L226 Difference]: Without dead ends: 596 [2021-12-28 02:32:13,877 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 [2021-12-28 02:32:13,879 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 986 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:13,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 1932 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:32:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-12-28 02:32:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 522. [2021-12-28 02:32:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 431 states have (on average 1.4709976798143851) internal successors, (634), 440 states have internal predecessors, (634), 58 states have call successors, (58), 29 states have call predecessors, (58), 31 states have return successors, (67), 56 states have call predecessors, (67), 54 states have call successors, (67) [2021-12-28 02:32:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 759 transitions. [2021-12-28 02:32:13,944 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 759 transitions. Word has length 65 [2021-12-28 02:32:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:13,945 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 759 transitions. [2021-12-28 02:32:13,945 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) [2021-12-28 02:32:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 759 transitions. [2021-12-28 02:32:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:32:13,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:13,953 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] [2021-12-28 02:32:13,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:32:13,954 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:13,955 INFO L85 PathProgramCache]: Analyzing trace with hash -361665499, now seen corresponding path program 1 times [2021-12-28 02:32:13,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:13,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702084152] [2021-12-28 02:32:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:13,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:14,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:14,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702084152] [2021-12-28 02:32:14,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702084152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:14,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:14,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:32:14,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892757844] [2021-12-28 02:32:14,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:14,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:32:14,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:32:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:32:14,122 INFO L87 Difference]: Start difference. First operand 522 states and 759 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:32:15,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:15,798 INFO L93 Difference]: Finished difference Result 1854 states and 2605 transitions. [2021-12-28 02:32:15,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:32:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-28 02:32:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:15,806 INFO L225 Difference]: With dead ends: 1854 [2021-12-28 02:32:15,806 INFO L226 Difference]: Without dead ends: 1569 [2021-12-28 02:32:15,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:32:15,809 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 2875 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2889 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:15,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2889 Valid, 1932 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:32:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-12-28 02:32:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1408. [2021-12-28 02:32:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1134 states have (on average 1.3835978835978835) internal successors, (1569), 1158 states have internal predecessors, (1569), 146 states have call successors, (146), 112 states have call predecessors, (146), 126 states have return successors, (178), 140 states have call predecessors, (178), 142 states have call successors, (178) [2021-12-28 02:32:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1893 transitions. [2021-12-28 02:32:15,900 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1893 transitions. Word has length 65 [2021-12-28 02:32:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:15,901 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 1893 transitions. [2021-12-28 02:32:15,901 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), 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) [2021-12-28 02:32:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1893 transitions. [2021-12-28 02:32:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:32:15,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:15,903 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] [2021-12-28 02:32:15,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:32:15,903 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash 689783590, now seen corresponding path program 1 times [2021-12-28 02:32:15,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:15,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873300969] [2021-12-28 02:32:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:15,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:16,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:16,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:16,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:16,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873300969] [2021-12-28 02:32:16,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873300969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:16,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:16,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:32:16,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413412483] [2021-12-28 02:32:16,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:16,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:32:16,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:32:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:32:16,015 INFO L87 Difference]: Start difference. First operand 1408 states and 1893 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:32:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:16,893 INFO L93 Difference]: Finished difference Result 2737 states and 3643 transitions. [2021-12-28 02:32:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:32:16,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-28 02:32:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:16,904 INFO L225 Difference]: With dead ends: 2737 [2021-12-28 02:32:16,904 INFO L226 Difference]: Without dead ends: 1572 [2021-12-28 02:32:16,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:32:16,909 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 602 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:16,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 1947 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:32:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-12-28 02:32:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1438. [2021-12-28 02:32:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1158 states have (on average 1.3687392055267702) internal successors, (1585), 1182 states have internal predecessors, (1585), 146 states have call successors, (146), 112 states have call predecessors, (146), 132 states have return successors, (184), 146 states have call predecessors, (184), 142 states have call successors, (184) [2021-12-28 02:32:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1915 transitions. [2021-12-28 02:32:17,000 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 1915 transitions. Word has length 65 [2021-12-28 02:32:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:17,001 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 1915 transitions. [2021-12-28 02:32:17,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:32:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 1915 transitions. [2021-12-28 02:32:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:32:17,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:17,003 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] [2021-12-28 02:32:17,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:32:17,003 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2075986984, now seen corresponding path program 1 times [2021-12-28 02:32:17,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:17,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385411315] [2021-12-28 02:32:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:17,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:17,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:17,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385411315] [2021-12-28 02:32:17,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385411315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:17,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:17,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:32:17,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002767865] [2021-12-28 02:32:17,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:17,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:32:17,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:32:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:17,141 INFO L87 Difference]: Start difference. First operand 1438 states and 1915 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) [2021-12-28 02:32:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:18,037 INFO L93 Difference]: Finished difference Result 2787 states and 3617 transitions. [2021-12-28 02:32:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 02:32:18,038 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 [2021-12-28 02:32:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:18,047 INFO L225 Difference]: With dead ends: 2787 [2021-12-28 02:32:18,047 INFO L226 Difference]: Without dead ends: 1815 [2021-12-28 02:32:18,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-12-28 02:32:18,052 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 1200 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:18,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 1459 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:32:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-12-28 02:32:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1380. [2021-12-28 02:32:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1116 states have (on average 1.3664874551971327) internal successors, (1525), 1135 states have internal predecessors, (1525), 140 states have call successors, (140), 107 states have call predecessors, (140), 122 states have return successors, (169), 139 states have call predecessors, (169), 136 states have call successors, (169) [2021-12-28 02:32:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1834 transitions. [2021-12-28 02:32:18,121 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1834 transitions. Word has length 65 [2021-12-28 02:32:18,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:18,122 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 1834 transitions. [2021-12-28 02:32:18,122 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) [2021-12-28 02:32:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1834 transitions. [2021-12-28 02:32:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:32:18,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:18,124 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] [2021-12-28 02:32:18,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:32:18,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1941973478, now seen corresponding path program 1 times [2021-12-28 02:32:18,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:18,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049407399] [2021-12-28 02:32:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:18,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:18,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:18,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049407399] [2021-12-28 02:32:18,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049407399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:18,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:18,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:18,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048878726] [2021-12-28 02:32:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:18,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:18,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:18,229 INFO L87 Difference]: Start difference. First operand 1380 states and 1834 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:32:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:18,682 INFO L93 Difference]: Finished difference Result 3734 states and 4852 transitions. [2021-12-28 02:32:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:32:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:32:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:18,696 INFO L225 Difference]: With dead ends: 3734 [2021-12-28 02:32:18,696 INFO L226 Difference]: Without dead ends: 2598 [2021-12-28 02:32:18,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:32:18,701 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 1170 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:18,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1197 Valid, 1188 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:32:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-12-28 02:32:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2478. [2021-12-28 02:32:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 1955 states have (on average 1.3048593350383633) internal successors, (2551), 1998 states have internal predecessors, (2551), 270 states have call successors, (270), 206 states have call predecessors, (270), 251 states have return successors, (381), 276 states have call predecessors, (381), 266 states have call successors, (381) [2021-12-28 02:32:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3202 transitions. [2021-12-28 02:32:18,829 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3202 transitions. Word has length 65 [2021-12-28 02:32:18,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:18,830 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 3202 transitions. [2021-12-28 02:32:18,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:32:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3202 transitions. [2021-12-28 02:32:18,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:32:18,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:18,832 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] [2021-12-28 02:32:18,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:32:18,832 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 754580266, now seen corresponding path program 1 times [2021-12-28 02:32:18,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:18,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185920525] [2021-12-28 02:32:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:18,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:18,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:18,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185920525] [2021-12-28 02:32:18,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185920525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:18,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:18,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:32:18,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869116544] [2021-12-28 02:32:18,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:18,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:32:18,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:32:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:32:18,930 INFO L87 Difference]: Start difference. First operand 2478 states and 3202 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:32:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:19,540 INFO L93 Difference]: Finished difference Result 5872 states and 7510 transitions. [2021-12-28 02:32:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:32:19,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-28 02:32:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:19,558 INFO L225 Difference]: With dead ends: 5872 [2021-12-28 02:32:19,558 INFO L226 Difference]: Without dead ends: 3643 [2021-12-28 02:32:19,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:32:19,566 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 816 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:19,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 1158 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:32:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2021-12-28 02:32:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 3312. [2021-12-28 02:32:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 2600 states have (on average 1.2896153846153846) internal successors, (3353), 2650 states have internal predecessors, (3353), 366 states have call successors, (366), 286 states have call predecessors, (366), 344 states have return successors, (500), 378 states have call predecessors, (500), 362 states have call successors, (500) [2021-12-28 02:32:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 4219 transitions. [2021-12-28 02:32:19,746 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 4219 transitions. Word has length 66 [2021-12-28 02:32:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:19,747 INFO L470 AbstractCegarLoop]: Abstraction has 3312 states and 4219 transitions. [2021-12-28 02:32:19,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:32:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 4219 transitions. [2021-12-28 02:32:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 02:32:19,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:19,749 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] [2021-12-28 02:32:19,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:32:19,749 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash 575552873, now seen corresponding path program 1 times [2021-12-28 02:32:19,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:19,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372160754] [2021-12-28 02:32:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:19,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:19,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:19,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372160754] [2021-12-28 02:32:19,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372160754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:19,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:19,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:32:19,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968540124] [2021-12-28 02:32:19,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:19,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:32:19,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:19,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:32:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:32:19,834 INFO L87 Difference]: Start difference. First operand 3312 states and 4219 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:32:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:20,347 INFO L93 Difference]: Finished difference Result 7298 states and 9218 transitions. [2021-12-28 02:32:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:32:20,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-28 02:32:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:20,367 INFO L225 Difference]: With dead ends: 7298 [2021-12-28 02:32:20,368 INFO L226 Difference]: Without dead ends: 4233 [2021-12-28 02:32:20,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:32:20,378 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 904 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:20,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [932 Valid, 1244 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:32:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2021-12-28 02:32:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 3887. [2021-12-28 02:32:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3887 states, 3055 states have (on average 1.2821603927986907) internal successors, (3917), 3109 states have internal predecessors, (3917), 425 states have call successors, (425), 336 states have call predecessors, (425), 405 states have return successors, (582), 444 states have call predecessors, (582), 421 states have call successors, (582) [2021-12-28 02:32:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3887 states to 3887 states and 4924 transitions. [2021-12-28 02:32:20,608 INFO L78 Accepts]: Start accepts. Automaton has 3887 states and 4924 transitions. Word has length 72 [2021-12-28 02:32:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:20,608 INFO L470 AbstractCegarLoop]: Abstraction has 3887 states and 4924 transitions. [2021-12-28 02:32:20,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:32:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3887 states and 4924 transitions. [2021-12-28 02:32:20,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 02:32:20,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:20,610 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:20,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:32:20,610 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:20,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:20,611 INFO L85 PathProgramCache]: Analyzing trace with hash 145752580, now seen corresponding path program 1 times [2021-12-28 02:32:20,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:20,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761092031] [2021-12-28 02:32:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:20,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:20,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:20,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:20,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:20,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:20,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:20,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:20,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:20,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:20,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761092031] [2021-12-28 02:32:20,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761092031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:20,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:20,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:20,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66628317] [2021-12-28 02:32:20,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:20,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:20,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:20,702 INFO L87 Difference]: Start difference. First operand 3887 states and 4924 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:32:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:21,222 INFO L93 Difference]: Finished difference Result 5069 states and 6380 transitions. [2021-12-28 02:32:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:32:21,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-28 02:32:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:21,245 INFO L225 Difference]: With dead ends: 5069 [2021-12-28 02:32:21,245 INFO L226 Difference]: Without dead ends: 5066 [2021-12-28 02:32:21,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:32:21,248 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 1379 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:21,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1389 Valid, 1215 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:32:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-12-28 02:32:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4354. [2021-12-28 02:32:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3412 states have (on average 1.272860492379836) internal successors, (4343), 3470 states have internal predecessors, (4343), 478 states have call successors, (478), 380 states have call predecessors, (478), 462 states have return successors, (664), 506 states have call predecessors, (664), 475 states have call successors, (664) [2021-12-28 02:32:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5485 transitions. [2021-12-28 02:32:21,483 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5485 transitions. Word has length 73 [2021-12-28 02:32:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:21,484 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5485 transitions. [2021-12-28 02:32:21,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:32:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5485 transitions. [2021-12-28 02:32:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 02:32:21,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:21,486 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:21,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:32:21,486 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash 222341395, now seen corresponding path program 1 times [2021-12-28 02:32:21,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:21,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424605346] [2021-12-28 02:32:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:21,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:21,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424605346] [2021-12-28 02:32:21,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424605346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620787412] [2021-12-28 02:32:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:21,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:21,599 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) [2021-12-28 02:32:21,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:32:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:32:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:22,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:32:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:22,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620787412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:32:22,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:32:22,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-28 02:32:22,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936942428] [2021-12-28 02:32:22,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:32:22,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:32:22,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:22,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:32:22,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:32:22,484 INFO L87 Difference]: Start difference. First operand 4354 states and 5485 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 02:32:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:24,096 INFO L93 Difference]: Finished difference Result 8895 states and 11093 transitions. [2021-12-28 02:32:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 02:32:24,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-28 02:32:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:24,137 INFO L225 Difference]: With dead ends: 8895 [2021-12-28 02:32:24,138 INFO L226 Difference]: Without dead ends: 8892 [2021-12-28 02:32:24,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-28 02:32:24,144 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 1748 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:24,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1806 Valid, 2348 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:32:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8892 states. [2021-12-28 02:32:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8892 to 7823. [2021-12-28 02:32:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7823 states, 6114 states have (on average 1.2600588812561335) internal successors, (7704), 6216 states have internal predecessors, (7704), 857 states have call successors, (857), 694 states have call predecessors, (857), 850 states have return successors, (1201), 915 states have call predecessors, (1201), 854 states have call successors, (1201) [2021-12-28 02:32:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 9762 transitions. [2021-12-28 02:32:24,612 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 9762 transitions. Word has length 74 [2021-12-28 02:32:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:24,612 INFO L470 AbstractCegarLoop]: Abstraction has 7823 states and 9762 transitions. [2021-12-28 02:32:24,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 02:32:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 9762 transitions. [2021-12-28 02:32:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:32:24,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:24,614 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:24,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:24,838 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,SelfDestructingSolverStorable9 [2021-12-28 02:32:24,839 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:24,839 INFO L85 PathProgramCache]: Analyzing trace with hash -279508924, now seen corresponding path program 2 times [2021-12-28 02:32:24,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:24,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542822163] [2021-12-28 02:32:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:24,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:24,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:24,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:24,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:24,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:24,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:24,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:24,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:24,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:24,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542822163] [2021-12-28 02:32:24,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542822163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:24,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:24,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:32:24,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400017236] [2021-12-28 02:32:24,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:24,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:32:24,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:32:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:32:24,909 INFO L87 Difference]: Start difference. First operand 7823 states and 9762 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:32:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:25,472 INFO L93 Difference]: Finished difference Result 10533 states and 13174 transitions. [2021-12-28 02:32:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:32:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-28 02:32:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:25,488 INFO L225 Difference]: With dead ends: 10533 [2021-12-28 02:32:25,488 INFO L226 Difference]: Without dead ends: 4316 [2021-12-28 02:32:25,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:32:25,502 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 839 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:25,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 1302 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:32:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4316 states. [2021-12-28 02:32:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4316 to 3199. [2021-12-28 02:32:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 2522 states have (on average 1.26050753370341) internal successors, (3179), 2558 states have internal predecessors, (3179), 350 states have call successors, (350), 276 states have call predecessors, (350), 325 states have return successors, (460), 367 states have call predecessors, (460), 347 states have call successors, (460) [2021-12-28 02:32:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 3989 transitions. [2021-12-28 02:32:25,680 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 3989 transitions. Word has length 77 [2021-12-28 02:32:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:25,681 INFO L470 AbstractCegarLoop]: Abstraction has 3199 states and 3989 transitions. [2021-12-28 02:32:25,681 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), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:32:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 3989 transitions. [2021-12-28 02:32:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 02:32:25,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:25,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:25,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:32:25,684 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash 976361349, now seen corresponding path program 1 times [2021-12-28 02:32:25,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:25,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588617572] [2021-12-28 02:32:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:25,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:32:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:32:25,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:25,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588617572] [2021-12-28 02:32:25,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588617572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:25,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:25,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:32:25,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527072616] [2021-12-28 02:32:25,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:25,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:32:25,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:32:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:25,777 INFO L87 Difference]: Start difference. First operand 3199 states and 3989 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:32:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:26,970 INFO L93 Difference]: Finished difference Result 9255 states and 11453 transitions. [2021-12-28 02:32:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 02:32:26,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-28 02:32:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:26,997 INFO L225 Difference]: With dead ends: 9255 [2021-12-28 02:32:26,998 INFO L226 Difference]: Without dead ends: 5440 [2021-12-28 02:32:27,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-12-28 02:32:27,012 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 1136 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:27,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 1770 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:32:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-12-28 02:32:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 5093. [2021-12-28 02:32:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5093 states, 3961 states have (on average 1.2297399646553901) internal successors, (4871), 4028 states have internal predecessors, (4871), 568 states have call successors, (568), 448 states have call predecessors, (568), 562 states have return successors, (854), 619 states have call predecessors, (854), 565 states have call successors, (854) [2021-12-28 02:32:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5093 states to 5093 states and 6293 transitions. [2021-12-28 02:32:27,308 INFO L78 Accepts]: Start accepts. Automaton has 5093 states and 6293 transitions. Word has length 84 [2021-12-28 02:32:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:27,308 INFO L470 AbstractCegarLoop]: Abstraction has 5093 states and 6293 transitions. [2021-12-28 02:32:27,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:32:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5093 states and 6293 transitions. [2021-12-28 02:32:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 02:32:27,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:27,311 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:27,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:32:27,311 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:27,312 INFO L85 PathProgramCache]: Analyzing trace with hash 788007266, now seen corresponding path program 1 times [2021-12-28 02:32:27,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:27,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386583898] [2021-12-28 02:32:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:27,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:32:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 02:32:27,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:27,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386583898] [2021-12-28 02:32:27,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386583898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:27,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:27,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:32:27,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196313830] [2021-12-28 02:32:27,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:27,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:32:27,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:27,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:32:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:32:27,426 INFO L87 Difference]: Start difference. First operand 5093 states and 6293 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) [2021-12-28 02:32:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:28,617 INFO L93 Difference]: Finished difference Result 9449 states and 11556 transitions. [2021-12-28 02:32:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 02:32:28,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-28 02:32:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:28,636 INFO L225 Difference]: With dead ends: 9449 [2021-12-28 02:32:28,636 INFO L226 Difference]: Without dead ends: 5172 [2021-12-28 02:32:28,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-28 02:32:28,648 INFO L933 BasicCegarLoop]: 523 mSDtfsCounter, 1511 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:28,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 1790 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:32:28,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-12-28 02:32:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 4801. [2021-12-28 02:32:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 3717 states have (on average 1.2085014796879203) internal successors, (4492), 3786 states have internal predecessors, (4492), 538 states have call successors, (538), 430 states have call predecessors, (538), 544 states have return successors, (745), 587 states have call predecessors, (745), 535 states have call successors, (745) [2021-12-28 02:32:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 5775 transitions. [2021-12-28 02:32:28,891 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 5775 transitions. Word has length 93 [2021-12-28 02:32:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:28,892 INFO L470 AbstractCegarLoop]: Abstraction has 4801 states and 5775 transitions. [2021-12-28 02:32:28,892 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) [2021-12-28 02:32:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 5775 transitions. [2021-12-28 02:32:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:32:28,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:28,895 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] [2021-12-28 02:32:28,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:32:28,895 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:28,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1464072493, now seen corresponding path program 1 times [2021-12-28 02:32:28,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:28,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538343478] [2021-12-28 02:32:28,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:28,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:28,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:28,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:32:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:28,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:32:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:28,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:28,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:28,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538343478] [2021-12-28 02:32:28,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538343478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:28,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:28,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:32:28,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444875664] [2021-12-28 02:32:28,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:28,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:32:28,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:28,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:32:28,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:32:28,989 INFO L87 Difference]: Start difference. First operand 4801 states and 5775 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-12-28 02:32:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:29,988 INFO L93 Difference]: Finished difference Result 5099 states and 6247 transitions. [2021-12-28 02:32:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:32:29,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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 113 [2021-12-28 02:32:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:30,003 INFO L225 Difference]: With dead ends: 5099 [2021-12-28 02:32:30,003 INFO L226 Difference]: Without dead ends: 4877 [2021-12-28 02:32:30,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:32:30,007 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 692 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:30,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 938 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:32:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-12-28 02:32:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4801. [2021-12-28 02:32:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 3717 states have (on average 1.208232445520581) internal successors, (4491), 3786 states have internal predecessors, (4491), 538 states have call successors, (538), 430 states have call predecessors, (538), 544 states have return successors, (745), 587 states have call predecessors, (745), 535 states have call successors, (745) [2021-12-28 02:32:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 5774 transitions. [2021-12-28 02:32:30,351 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 5774 transitions. Word has length 113 [2021-12-28 02:32:30,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:30,351 INFO L470 AbstractCegarLoop]: Abstraction has 4801 states and 5774 transitions. [2021-12-28 02:32:30,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-12-28 02:32:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 5774 transitions. [2021-12-28 02:32:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:32:30,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:30,354 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] [2021-12-28 02:32:30,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:32:30,355 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:30,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash 433031595, now seen corresponding path program 1 times [2021-12-28 02:32:30,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:30,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821643254] [2021-12-28 02:32:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:30,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:32:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:32:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:30,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821643254] [2021-12-28 02:32:30,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821643254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:30,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:30,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:30,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599763399] [2021-12-28 02:32:30,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:30,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:30,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:30,457 INFO L87 Difference]: Start difference. First operand 4801 states and 5774 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:32,498 INFO L93 Difference]: Finished difference Result 5412 states and 6754 transitions. [2021-12-28 02:32:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:32:32,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-28 02:32:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:32,512 INFO L225 Difference]: With dead ends: 5412 [2021-12-28 02:32:32,512 INFO L226 Difference]: Without dead ends: 5192 [2021-12-28 02:32:32,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:32:32,517 INFO L933 BasicCegarLoop]: 725 mSDtfsCounter, 1048 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 2172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:32,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 2126 Invalid, 2172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 02:32:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5192 states. [2021-12-28 02:32:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5192 to 5029. [2021-12-28 02:32:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5029 states, 3920 states have (on average 1.2275510204081632) internal successors, (4812), 3991 states have internal predecessors, (4812), 555 states have call successors, (555), 436 states have call predecessors, (555), 552 states have return successors, (769), 605 states have call predecessors, (769), 552 states have call successors, (769) [2021-12-28 02:32:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5029 states to 5029 states and 6136 transitions. [2021-12-28 02:32:32,878 INFO L78 Accepts]: Start accepts. Automaton has 5029 states and 6136 transitions. Word has length 113 [2021-12-28 02:32:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:32,878 INFO L470 AbstractCegarLoop]: Abstraction has 5029 states and 6136 transitions. [2021-12-28 02:32:32,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5029 states and 6136 transitions. [2021-12-28 02:32:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:32:32,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:32,882 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] [2021-12-28 02:32:32,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:32:32,882 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:32,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:32,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1784416813, now seen corresponding path program 1 times [2021-12-28 02:32:32,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:32,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288995004] [2021-12-28 02:32:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:32,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:32,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:32,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:32:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:32,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:32:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:32,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:32,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:32,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:32,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288995004] [2021-12-28 02:32:32,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288995004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:32,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:32,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:32,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681956004] [2021-12-28 02:32:32,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:32,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:32,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:32,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:32,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:32,984 INFO L87 Difference]: Start difference. First operand 5029 states and 6136 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:34,834 INFO L93 Difference]: Finished difference Result 6186 states and 7976 transitions. [2021-12-28 02:32:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:32:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-28 02:32:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:34,852 INFO L225 Difference]: With dead ends: 6186 [2021-12-28 02:32:34,853 INFO L226 Difference]: Without dead ends: 5740 [2021-12-28 02:32:34,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:32:34,857 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 1050 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:34,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 2033 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:32:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5740 states. [2021-12-28 02:32:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5740 to 5449. [2021-12-28 02:32:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5449 states, 4296 states have (on average 1.2558193668528863) internal successors, (5395), 4369 states have internal predecessors, (5395), 585 states have call successors, (585), 448 states have call predecessors, (585), 566 states have return successors, (809), 637 states have call predecessors, (809), 582 states have call successors, (809) [2021-12-28 02:32:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5449 states to 5449 states and 6789 transitions. [2021-12-28 02:32:35,208 INFO L78 Accepts]: Start accepts. Automaton has 5449 states and 6789 transitions. Word has length 113 [2021-12-28 02:32:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:35,208 INFO L470 AbstractCegarLoop]: Abstraction has 5449 states and 6789 transitions. [2021-12-28 02:32:35,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 5449 states and 6789 transitions. [2021-12-28 02:32:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:32:35,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:35,212 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] [2021-12-28 02:32:35,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:32:35,212 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash 165441899, now seen corresponding path program 1 times [2021-12-28 02:32:35,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:35,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498909268] [2021-12-28 02:32:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:35,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:35,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:35,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:32:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:35,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:32:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:35,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:35,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:35,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:35,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498909268] [2021-12-28 02:32:35,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498909268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:35,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:35,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:35,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098018594] [2021-12-28 02:32:35,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:35,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:35,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:35,319 INFO L87 Difference]: Start difference. First operand 5449 states and 6789 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:37,106 INFO L93 Difference]: Finished difference Result 7700 states and 10361 transitions. [2021-12-28 02:32:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:32:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-28 02:32:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:37,132 INFO L225 Difference]: With dead ends: 7700 [2021-12-28 02:32:37,132 INFO L226 Difference]: Without dead ends: 6834 [2021-12-28 02:32:37,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:32:37,141 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 1071 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:37,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 2007 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:32:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6834 states. [2021-12-28 02:32:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6834 to 6291. [2021-12-28 02:32:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6291 states, 5050 states have (on average 1.2996039603960396) internal successors, (6563), 5127 states have internal predecessors, (6563), 645 states have call successors, (645), 472 states have call predecessors, (645), 594 states have return successors, (895), 701 states have call predecessors, (895), 642 states have call successors, (895) [2021-12-28 02:32:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6291 states to 6291 states and 8103 transitions. [2021-12-28 02:32:37,590 INFO L78 Accepts]: Start accepts. Automaton has 6291 states and 8103 transitions. Word has length 113 [2021-12-28 02:32:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:37,590 INFO L470 AbstractCegarLoop]: Abstraction has 6291 states and 8103 transitions. [2021-12-28 02:32:37,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 6291 states and 8103 transitions. [2021-12-28 02:32:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:32:37,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:37,594 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] [2021-12-28 02:32:37,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:32:37,595 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash -718067091, now seen corresponding path program 1 times [2021-12-28 02:32:37,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:37,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572587033] [2021-12-28 02:32:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:37,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:37,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:37,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:32:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:37,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:32:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:37,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:37,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:37,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:37,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572587033] [2021-12-28 02:32:37,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572587033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:37,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:37,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:37,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782884988] [2021-12-28 02:32:37,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:37,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:37,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:37,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:37,683 INFO L87 Difference]: Start difference. First operand 6291 states and 8103 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:39,764 INFO L93 Difference]: Finished difference Result 10726 states and 15145 transitions. [2021-12-28 02:32:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:32:39,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-28 02:32:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:39,792 INFO L225 Difference]: With dead ends: 10726 [2021-12-28 02:32:39,792 INFO L226 Difference]: Without dead ends: 9018 [2021-12-28 02:32:39,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:32:39,803 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1048 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:39,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 2112 Invalid, 2161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:32:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9018 states. [2021-12-28 02:32:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9018 to 7981. [2021-12-28 02:32:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 6564 states have (on average 1.356946983546618) internal successors, (8907), 6649 states have internal predecessors, (8907), 765 states have call successors, (765), 520 states have call predecessors, (765), 650 states have return successors, (1085), 829 states have call predecessors, (1085), 762 states have call successors, (1085) [2021-12-28 02:32:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 10757 transitions. [2021-12-28 02:32:40,292 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 10757 transitions. Word has length 113 [2021-12-28 02:32:40,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:40,293 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 10757 transitions. [2021-12-28 02:32:40,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 10757 transitions. [2021-12-28 02:32:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:32:40,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:40,302 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] [2021-12-28 02:32:40,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:32:40,302 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:40,303 INFO L85 PathProgramCache]: Analyzing trace with hash -746567381, now seen corresponding path program 1 times [2021-12-28 02:32:40,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:40,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101162614] [2021-12-28 02:32:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:40,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:40,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:40,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:32:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:40,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:32:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:40,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:40,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:40,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101162614] [2021-12-28 02:32:40,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101162614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:40,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:40,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:40,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902413157] [2021-12-28 02:32:40,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:40,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:40,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:40,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:40,405 INFO L87 Difference]: Start difference. First operand 7981 states and 10757 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:42,524 INFO L93 Difference]: Finished difference Result 16776 states and 24769 transitions. [2021-12-28 02:32:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:32:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-28 02:32:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:42,569 INFO L225 Difference]: With dead ends: 16776 [2021-12-28 02:32:42,569 INFO L226 Difference]: Without dead ends: 13378 [2021-12-28 02:32:42,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:32:42,588 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 1048 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:42,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 2109 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2045 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:32:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13378 states. [2021-12-28 02:32:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13378 to 11375. [2021-12-28 02:32:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11375 states, 9606 states have (on average 1.417343327087237) internal successors, (13615), 9707 states have internal predecessors, (13615), 1005 states have call successors, (1005), 616 states have call predecessors, (1005), 762 states have return successors, (1519), 1085 states have call predecessors, (1519), 1002 states have call successors, (1519) [2021-12-28 02:32:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11375 states to 11375 states and 16139 transitions. [2021-12-28 02:32:43,283 INFO L78 Accepts]: Start accepts. Automaton has 11375 states and 16139 transitions. Word has length 113 [2021-12-28 02:32:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:43,284 INFO L470 AbstractCegarLoop]: Abstraction has 11375 states and 16139 transitions. [2021-12-28 02:32:43,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 11375 states and 16139 transitions. [2021-12-28 02:32:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:32:43,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:43,291 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] [2021-12-28 02:32:43,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:32:43,291 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1607817901, now seen corresponding path program 1 times [2021-12-28 02:32:43,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:43,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044283840] [2021-12-28 02:32:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:43,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:32:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:32:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:43,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044283840] [2021-12-28 02:32:43,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044283840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:43,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:43,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:43,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228561801] [2021-12-28 02:32:43,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:43,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:43,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:43,372 INFO L87 Difference]: Start difference. First operand 11375 states and 16139 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:46,153 INFO L93 Difference]: Finished difference Result 28874 states and 44205 transitions. [2021-12-28 02:32:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:32:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-28 02:32:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:46,219 INFO L225 Difference]: With dead ends: 28874 [2021-12-28 02:32:46,220 INFO L226 Difference]: Without dead ends: 22082 [2021-12-28 02:32:46,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:32:46,248 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 1048 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:46,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 2106 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:32:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22082 states. [2021-12-28 02:32:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22082 to 18193. [2021-12-28 02:32:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18193 states, 15720 states have (on average 1.4678753180661577) internal successors, (23075), 15853 states have internal predecessors, (23075), 1485 states have call successors, (1485), 808 states have call predecessors, (1485), 986 states have return successors, (2549), 1597 states have call predecessors, (2549), 1482 states have call successors, (2549) [2021-12-28 02:32:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18193 states to 18193 states and 27109 transitions. [2021-12-28 02:32:47,252 INFO L78 Accepts]: Start accepts. Automaton has 18193 states and 27109 transitions. Word has length 113 [2021-12-28 02:32:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:47,253 INFO L470 AbstractCegarLoop]: Abstraction has 18193 states and 27109 transitions. [2021-12-28 02:32:47,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:47,253 INFO L276 IsEmpty]: Start isEmpty. Operand 18193 states and 27109 transitions. [2021-12-28 02:32:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:32:47,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:47,264 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] [2021-12-28 02:32:47,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:32:47,265 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash -810086165, now seen corresponding path program 1 times [2021-12-28 02:32:47,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:47,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26666406] [2021-12-28 02:32:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:47,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:32:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:32:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:47,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:47,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26666406] [2021-12-28 02:32:47,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26666406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:47,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:47,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:47,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771821261] [2021-12-28 02:32:47,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:47,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:47,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:47,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:47,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:47,354 INFO L87 Difference]: Start difference. First operand 18193 states and 27109 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:51,711 INFO L93 Difference]: Finished difference Result 59020 states and 92635 transitions. [2021-12-28 02:32:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:32:51,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-28 02:32:51,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:51,834 INFO L225 Difference]: With dead ends: 59020 [2021-12-28 02:32:51,835 INFO L226 Difference]: Without dead ends: 45410 [2021-12-28 02:32:51,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:32:51,872 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 1114 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 2444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:51,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 2195 Invalid, 2444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-28 02:32:51,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45410 states. [2021-12-28 02:32:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45410 to 31699. [2021-12-28 02:32:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31699 states, 27882 states have (on average 1.5048776988738255) internal successors, (41959), 28079 states have internal predecessors, (41959), 2381 states have call successors, (2381), 1192 states have call predecessors, (2381), 1434 states have return successors, (5031), 2557 states have call predecessors, (5031), 2378 states have call successors, (5031) [2021-12-28 02:32:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31699 states to 31699 states and 49371 transitions. [2021-12-28 02:32:53,799 INFO L78 Accepts]: Start accepts. Automaton has 31699 states and 49371 transitions. Word has length 113 [2021-12-28 02:32:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:53,799 INFO L470 AbstractCegarLoop]: Abstraction has 31699 states and 49371 transitions. [2021-12-28 02:32:53,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-28 02:32:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 31699 states and 49371 transitions. [2021-12-28 02:32:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:32:53,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:53,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:53,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 02:32:53,819 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1580819731, now seen corresponding path program 1 times [2021-12-28 02:32:53,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:53,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242285688] [2021-12-28 02:32:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:53,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:53,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:53,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:32:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:53,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:32:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:53,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:53,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:53,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:53,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242285688] [2021-12-28 02:32:53,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242285688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:53,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:53,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:53,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884576944] [2021-12-28 02:32:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:53,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:53,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:53,918 INFO L87 Difference]: Start difference. First operand 31699 states and 49371 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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)