./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:32:58,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:32:58,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:32:58,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:32:58,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:32:58,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:32:58,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:32:58,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:32:58,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:32:58,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:32:58,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:32:58,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:32:58,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:32:58,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:32:58,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:32:58,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:32:58,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:32:58,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:32:58,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:32:58,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:32:58,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:32:58,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:32:58,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:32:58,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:32:58,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:32:58,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:32:58,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:32:58,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:32:58,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:32:58,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:32:58,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:32:58,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:32:58,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:32:58,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:32:58,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:32:58,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:32:58,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:32:58,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:32:58,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:32:58,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:32:58,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:32:58,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:32:58,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:32:58,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:32:58,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:32:58,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:32:58,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:32:58,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:32:58,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:32:58,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:32:58,475 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:32:58,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:32:58,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:32:58,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:32:58,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:32:58,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:32:58,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:32:58,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:32:58,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:32:58,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:32:58,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:32:58,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:32:58,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:32:58,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:32:58,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:32:58,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:32:58,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:32:58,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:32:58,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:32:58,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:32:58,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:32:58,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:32:58,480 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:32:58,480 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:32:58,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:32:58,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:32:58,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e [2021-12-16 02:32:58,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:32:58,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:32:58,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:32:58,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:32:58,687 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:32:58,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c [2021-12-16 02:32:58,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54f362b20/b87ed9eada9544a8898a66900333ecc7/FLAGe48435663 [2021-12-16 02:32:59,135 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:32:59,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c [2021-12-16 02:32:59,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54f362b20/b87ed9eada9544a8898a66900333ecc7/FLAGe48435663 [2021-12-16 02:32:59,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54f362b20/b87ed9eada9544a8898a66900333ecc7 [2021-12-16 02:32:59,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:32:59,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:32:59,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:32:59,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:32:59,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:32:59,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6bca86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59, skipping insertion in model container [2021-12-16 02:32:59,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:32:59,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:32:59,329 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.14.cil.c[914,927] [2021-12-16 02:32:59,366 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.14.cil.c[7115,7128] [2021-12-16 02:32:59,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:32:59,443 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:32:59,457 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.14.cil.c[914,927] [2021-12-16 02:32:59,469 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.14.cil.c[7115,7128] [2021-12-16 02:32:59,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:32:59,518 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:32:59,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59 WrapperNode [2021-12-16 02:32:59,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:32:59,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:32:59,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:32:59,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:32:59,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,600 INFO L137 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1043 [2021-12-16 02:32:59,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:32:59,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:32:59,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:32:59,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:32:59,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:32:59,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:32:59,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:32:59,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:32:59,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (1/1) ... [2021-12-16 02:32:59,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:32:59,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:59,709 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) [2021-12-16 02:32:59,725 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 [2021-12-16 02:32:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:32:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 02:32:59,737 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 02:32:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-16 02:32:59,737 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-16 02:32:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-16 02:32:59,737 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-16 02:32:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-16 02:32:59,738 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-16 02:32:59,738 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-16 02:32:59,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-16 02:32:59,738 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-16 02:32:59,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-16 02:32:59,738 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-16 02:32:59,738 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-16 02:32:59,738 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-16 02:32:59,739 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-16 02:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-16 02:32:59,739 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-16 02:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-16 02:32:59,739 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-16 02:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-16 02:32:59,739 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-16 02:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:32:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-16 02:32:59,740 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-16 02:32:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-16 02:32:59,740 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-16 02:32:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:32:59,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:32:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-16 02:32:59,740 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-16 02:32:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-16 02:32:59,740 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-16 02:32:59,879 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:32:59,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:33:00,487 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:33:00,502 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:33:00,503 INFO L301 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-16 02:33:00,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:33:00 BoogieIcfgContainer [2021-12-16 02:33:00,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:33:00,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:33:00,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:33:00,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:33:00,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:32:59" (1/3) ... [2021-12-16 02:33:00,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e834796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:33:00, skipping insertion in model container [2021-12-16 02:33:00,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:32:59" (2/3) ... [2021-12-16 02:33:00,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e834796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:33:00, skipping insertion in model container [2021-12-16 02:33:00,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:33:00" (3/3) ... [2021-12-16 02:33:00,511 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.14.cil.c [2021-12-16 02:33:00,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:33:00,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:33:00,562 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:33:00,567 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 [2021-12-16 02:33:00,567 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:33:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 489 states, 429 states have (on average 1.6433566433566433) internal successors, (705), 437 states have internal predecessors, (705), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-16 02:33:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:33:00,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:00,593 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] [2021-12-16 02:33:00,593 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash 956122995, now seen corresponding path program 1 times [2021-12-16 02:33:00,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:00,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683668287] [2021-12-16 02:33:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:00,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:00,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:00,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:00,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:00,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:00,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:00,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:00,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:00,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:00,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683668287] [2021-12-16 02:33:00,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683668287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:00,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:00,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:33:00,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886256433] [2021-12-16 02:33:00,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:00,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:33:00,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:33:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:33:00,940 INFO L87 Difference]: Start difference. First operand has 489 states, 429 states have (on average 1.6433566433566433) internal successors, (705), 437 states have internal predecessors, (705), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 02:33:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:01,882 INFO L93 Difference]: Finished difference Result 1084 states and 1736 transitions. [2021-12-16 02:33:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:33:01,896 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 [2021-12-16 02:33:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:01,912 INFO L225 Difference]: With dead ends: 1084 [2021-12-16 02:33:01,912 INFO L226 Difference]: Without dead ends: 613 [2021-12-16 02:33:01,919 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 [2021-12-16 02:33:01,922 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 1209 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:01,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 2542 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 02:33:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-12-16 02:33:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 574. [2021-12-16 02:33:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 497 states have (on average 1.529175050301811) internal successors, (760), 504 states have internal predecessors, (760), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (54), 50 states have call predecessors, (54), 49 states have call successors, (54) [2021-12-16 02:33:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 867 transitions. [2021-12-16 02:33:01,993 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 867 transitions. Word has length 65 [2021-12-16 02:33:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:01,993 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 867 transitions. [2021-12-16 02:33:01,994 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) [2021-12-16 02:33:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 867 transitions. [2021-12-16 02:33:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:33:01,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:01,999 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] [2021-12-16 02:33:01,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:33:01,999 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:02,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1359908946, now seen corresponding path program 1 times [2021-12-16 02:33:02,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:02,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966904908] [2021-12-16 02:33:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:02,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:02,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:02,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:02,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:02,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:02,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:02,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:02,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:02,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:02,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966904908] [2021-12-16 02:33:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966904908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:02,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:02,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:33:02,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497020885] [2021-12-16 02:33:02,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:02,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:33:02,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:02,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:33:02,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:33:02,124 INFO L87 Difference]: Start difference. First operand 574 states and 867 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) [2021-12-16 02:33:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:03,084 INFO L93 Difference]: Finished difference Result 921 states and 1344 transitions. [2021-12-16 02:33:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 02:33:03,085 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 [2021-12-16 02:33:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:03,091 INFO L225 Difference]: With dead ends: 921 [2021-12-16 02:33:03,091 INFO L226 Difference]: Without dead ends: 744 [2021-12-16 02:33:03,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-16 02:33:03,093 INFO L933 BasicCegarLoop]: 780 mSDtfsCounter, 1480 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:03,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 2772 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 02:33:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-16 02:33:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 670. [2021-12-16 02:33:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 573 states have (on average 1.5078534031413613) internal successors, (864), 582 states have internal predecessors, (864), 64 states have call successors, (64), 29 states have call predecessors, (64), 31 states have return successors, (73), 62 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-16 02:33:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1001 transitions. [2021-12-16 02:33:03,125 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1001 transitions. Word has length 65 [2021-12-16 02:33:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:03,125 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1001 transitions. [2021-12-16 02:33:03,126 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) [2021-12-16 02:33:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1001 transitions. [2021-12-16 02:33:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:33:03,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:03,128 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] [2021-12-16 02:33:03,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:33:03,128 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash -668677164, now seen corresponding path program 1 times [2021-12-16 02:33:03,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345669508] [2021-12-16 02:33:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:03,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:03,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:03,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:03,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:03,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:03,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:03,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:03,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:03,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:03,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345669508] [2021-12-16 02:33:03,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345669508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:03,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:03,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 02:33:03,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950551669] [2021-12-16 02:33:03,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:03,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 02:33:03,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 02:33:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:33:03,239 INFO L87 Difference]: Start difference. First operand 670 states and 1001 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) [2021-12-16 02:33:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:04,067 INFO L93 Difference]: Finished difference Result 971 states and 1415 transitions. [2021-12-16 02:33:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 02:33:04,068 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 [2021-12-16 02:33:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:04,071 INFO L225 Difference]: With dead ends: 971 [2021-12-16 02:33:04,071 INFO L226 Difference]: Without dead ends: 704 [2021-12-16 02:33:04,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:33:04,073 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 971 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:04,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 3051 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 02:33:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-16 02:33:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 675. [2021-12-16 02:33:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 577 states have (on average 1.5008665511265165) internal successors, (866), 586 states have internal predecessors, (866), 64 states have call successors, (64), 29 states have call predecessors, (64), 32 states have return successors, (74), 63 states have call predecessors, (74), 60 states have call successors, (74) [2021-12-16 02:33:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1004 transitions. [2021-12-16 02:33:04,115 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1004 transitions. Word has length 65 [2021-12-16 02:33:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:04,115 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1004 transitions. [2021-12-16 02:33:04,115 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) [2021-12-16 02:33:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1004 transitions. [2021-12-16 02:33:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:33:04,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:04,120 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] [2021-12-16 02:33:04,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:33:04,121 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1698036462, now seen corresponding path program 1 times [2021-12-16 02:33:04,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:04,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659227693] [2021-12-16 02:33:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:04,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:04,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:04,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:04,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:04,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:04,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:04,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:04,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:04,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659227693] [2021-12-16 02:33:04,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659227693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:04,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:04,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 02:33:04,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412991428] [2021-12-16 02:33:04,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:04,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 02:33:04,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 02:33:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:33:04,260 INFO L87 Difference]: Start difference. First operand 675 states and 1004 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) [2021-12-16 02:33:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:05,689 INFO L93 Difference]: Finished difference Result 1997 states and 2800 transitions. [2021-12-16 02:33:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 02:33:05,690 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 [2021-12-16 02:33:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:05,696 INFO L225 Difference]: With dead ends: 1997 [2021-12-16 02:33:05,696 INFO L226 Difference]: Without dead ends: 1707 [2021-12-16 02:33:05,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 02:33:05,698 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 4059 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4073 SdHoareTripleChecker+Valid, 2639 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:05,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4073 Valid, 2639 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 02:33:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-12-16 02:33:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1576. [2021-12-16 02:33:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1292 states have (on average 1.3970588235294117) internal successors, (1805), 1316 states have internal predecessors, (1805), 152 states have call successors, (152), 112 states have call predecessors, (152), 130 states have return successors, (188), 150 states have call predecessors, (188), 148 states have call successors, (188) [2021-12-16 02:33:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2145 transitions. [2021-12-16 02:33:05,757 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2145 transitions. Word has length 65 [2021-12-16 02:33:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:05,757 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 2145 transitions. [2021-12-16 02:33:05,757 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) [2021-12-16 02:33:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2145 transitions. [2021-12-16 02:33:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:33:05,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:05,758 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] [2021-12-16 02:33:05,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:33:05,758 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2104827032, now seen corresponding path program 1 times [2021-12-16 02:33:05,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:05,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002823252] [2021-12-16 02:33:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:05,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:05,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:05,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:05,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:05,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:05,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:05,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:05,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:05,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002823252] [2021-12-16 02:33:05,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002823252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:05,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:05,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 02:33:05,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618376272] [2021-12-16 02:33:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:05,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 02:33:05,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 02:33:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:33:05,870 INFO L87 Difference]: Start difference. First operand 1576 states and 2145 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) [2021-12-16 02:33:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:06,706 INFO L93 Difference]: Finished difference Result 2867 states and 3818 transitions. [2021-12-16 02:33:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 02:33:06,707 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 [2021-12-16 02:33:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:06,712 INFO L225 Difference]: With dead ends: 2867 [2021-12-16 02:33:06,712 INFO L226 Difference]: Without dead ends: 1682 [2021-12-16 02:33:06,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-16 02:33:06,717 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 652 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:06,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 3364 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 02:33:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-12-16 02:33:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1606. [2021-12-16 02:33:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1316 states have (on average 1.3837386018237081) internal successors, (1821), 1340 states have internal predecessors, (1821), 152 states have call successors, (152), 112 states have call predecessors, (152), 136 states have return successors, (194), 156 states have call predecessors, (194), 148 states have call successors, (194) [2021-12-16 02:33:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2167 transitions. [2021-12-16 02:33:06,765 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2167 transitions. Word has length 65 [2021-12-16 02:33:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:06,766 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 2167 transitions. [2021-12-16 02:33:06,766 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) [2021-12-16 02:33:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2167 transitions. [2021-12-16 02:33:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:33:06,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:06,767 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] [2021-12-16 02:33:06,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:33:06,768 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash -718623638, now seen corresponding path program 1 times [2021-12-16 02:33:06,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:06,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210197915] [2021-12-16 02:33:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:06,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:06,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:06,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:06,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:06,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:06,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:06,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:06,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:06,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:06,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210197915] [2021-12-16 02:33:06,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210197915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:06,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:06,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:33:06,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242259645] [2021-12-16 02:33:06,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:06,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:33:06,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:33:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:33:06,874 INFO L87 Difference]: Start difference. First operand 1606 states and 2167 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) [2021-12-16 02:33:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:07,697 INFO L93 Difference]: Finished difference Result 2861 states and 3714 transitions. [2021-12-16 02:33:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 02:33:07,698 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 [2021-12-16 02:33:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:07,704 INFO L225 Difference]: With dead ends: 2861 [2021-12-16 02:33:07,704 INFO L226 Difference]: Without dead ends: 1869 [2021-12-16 02:33:07,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-16 02:33:07,707 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 1439 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 2495 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:07,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 2495 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 02:33:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-12-16 02:33:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1548. [2021-12-16 02:33:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1274 states have (on average 1.3814756671899528) internal successors, (1760), 1293 states have internal predecessors, (1760), 146 states have call successors, (146), 107 states have call predecessors, (146), 126 states have return successors, (179), 149 states have call predecessors, (179), 142 states have call successors, (179) [2021-12-16 02:33:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 2085 transitions. [2021-12-16 02:33:07,777 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 2085 transitions. Word has length 65 [2021-12-16 02:33:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:07,778 INFO L470 AbstractCegarLoop]: Abstraction has 1548 states and 2085 transitions. [2021-12-16 02:33:07,778 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) [2021-12-16 02:33:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 2085 transitions. [2021-12-16 02:33:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:33:07,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:07,779 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] [2021-12-16 02:33:07,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 02:33:07,782 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:07,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash -852637144, now seen corresponding path program 1 times [2021-12-16 02:33:07,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:07,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170096487] [2021-12-16 02:33:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:07,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:07,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:07,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:07,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:07,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:07,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:07,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:07,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:07,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:07,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170096487] [2021-12-16 02:33:07,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170096487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:07,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:07,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:07,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387797309] [2021-12-16 02:33:07,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:07,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:07,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:07,857 INFO L87 Difference]: Start difference. First operand 1548 states and 2085 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) [2021-12-16 02:33:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:08,237 INFO L93 Difference]: Finished difference Result 3887 states and 5046 transitions. [2021-12-16 02:33:08,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 02:33:08,238 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 [2021-12-16 02:33:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:08,247 INFO L225 Difference]: With dead ends: 3887 [2021-12-16 02:33:08,248 INFO L226 Difference]: Without dead ends: 2731 [2021-12-16 02:33:08,250 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 [2021-12-16 02:33:08,251 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 1410 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:08,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 2079 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:33:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-12-16 02:33:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 2611. [2021-12-16 02:33:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2094 states have (on average 1.3142311365807067) internal successors, (2752), 2130 states have internal predecessors, (2752), 265 states have call successors, (265), 206 states have call predecessors, (265), 250 states have return successors, (370), 277 states have call predecessors, (370), 261 states have call successors, (370) [2021-12-16 02:33:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 3387 transitions. [2021-12-16 02:33:08,352 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 3387 transitions. Word has length 65 [2021-12-16 02:33:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:08,352 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 3387 transitions. [2021-12-16 02:33:08,352 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) [2021-12-16 02:33:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 3387 transitions. [2021-12-16 02:33:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:33:08,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:08,353 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] [2021-12-16 02:33:08,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 02:33:08,354 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:08,354 INFO L85 PathProgramCache]: Analyzing trace with hash 20568174, now seen corresponding path program 1 times [2021-12-16 02:33:08,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:08,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021455734] [2021-12-16 02:33:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:08,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:08,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:08,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:08,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:08,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:08,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:08,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:08,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:08,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:08,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021455734] [2021-12-16 02:33:08,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021455734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:08,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:08,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:33:08,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817253710] [2021-12-16 02:33:08,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:08,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:33:08,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:33:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:33:08,407 INFO L87 Difference]: Start difference. First operand 2611 states and 3387 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) [2021-12-16 02:33:09,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:09,023 INFO L93 Difference]: Finished difference Result 5927 states and 7532 transitions. [2021-12-16 02:33:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:33:09,023 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 [2021-12-16 02:33:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:09,037 INFO L225 Difference]: With dead ends: 5927 [2021-12-16 02:33:09,038 INFO L226 Difference]: Without dead ends: 3713 [2021-12-16 02:33:09,042 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 [2021-12-16 02:33:09,043 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 828 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:09,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 2103 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 02:33:09,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-12-16 02:33:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 3445. [2021-12-16 02:33:09,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 2742 states have (on average 1.2935813274981764) internal successors, (3547), 2783 states have internal predecessors, (3547), 357 states have call successors, (357), 286 states have call predecessors, (357), 344 states have return successors, (484), 378 states have call predecessors, (484), 353 states have call successors, (484) [2021-12-16 02:33:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4388 transitions. [2021-12-16 02:33:09,148 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4388 transitions. Word has length 66 [2021-12-16 02:33:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:09,148 INFO L470 AbstractCegarLoop]: Abstraction has 3445 states and 4388 transitions. [2021-12-16 02:33:09,148 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) [2021-12-16 02:33:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4388 transitions. [2021-12-16 02:33:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 02:33:09,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:09,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:09,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 02:33:09,150 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:09,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1226736109, now seen corresponding path program 1 times [2021-12-16 02:33:09,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:09,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111651710] [2021-12-16 02:33:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:09,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:09,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:09,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111651710] [2021-12-16 02:33:09,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111651710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:09,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:09,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:33:09,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543416250] [2021-12-16 02:33:09,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:09,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:33:09,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:33:09,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:33:09,213 INFO L87 Difference]: Start difference. First operand 3445 states and 4388 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) [2021-12-16 02:33:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:09,612 INFO L93 Difference]: Finished difference Result 7317 states and 9162 transitions. [2021-12-16 02:33:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:33:09,612 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 [2021-12-16 02:33:09,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:09,627 INFO L225 Difference]: With dead ends: 7317 [2021-12-16 02:33:09,627 INFO L226 Difference]: Without dead ends: 4267 [2021-12-16 02:33:09,633 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 [2021-12-16 02:33:09,635 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1381 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1415 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:09,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1415 Valid, 1822 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:33:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2021-12-16 02:33:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 3999. [2021-12-16 02:33:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3182 states have (on average 1.2844123192960402) internal successors, (4087), 3227 states have internal predecessors, (4087), 413 states have call successors, (413), 336 states have call predecessors, (413), 402 states have return successors, (557), 438 states have call predecessors, (557), 409 states have call successors, (557) [2021-12-16 02:33:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 5057 transitions. [2021-12-16 02:33:09,793 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 5057 transitions. Word has length 72 [2021-12-16 02:33:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:09,794 INFO L470 AbstractCegarLoop]: Abstraction has 3999 states and 5057 transitions. [2021-12-16 02:33:09,794 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) [2021-12-16 02:33:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 5057 transitions. [2021-12-16 02:33:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 02:33:09,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:09,796 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] [2021-12-16 02:33:09,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 02:33:09,796 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:09,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1142832314, now seen corresponding path program 1 times [2021-12-16 02:33:09,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:09,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169742673] [2021-12-16 02:33:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:09,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:09,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:09,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169742673] [2021-12-16 02:33:09,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169742673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:09,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:09,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:09,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802708686] [2021-12-16 02:33:09,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:09,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:09,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:09,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:09,859 INFO L87 Difference]: Start difference. First operand 3999 states and 5057 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) [2021-12-16 02:33:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:10,321 INFO L93 Difference]: Finished difference Result 5085 states and 6352 transitions. [2021-12-16 02:33:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 02:33:10,321 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 [2021-12-16 02:33:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:10,339 INFO L225 Difference]: With dead ends: 5085 [2021-12-16 02:33:10,339 INFO L226 Difference]: Without dead ends: 5082 [2021-12-16 02:33:10,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-16 02:33:10,342 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 2428 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2438 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:10,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2438 Valid, 1451 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:33:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2021-12-16 02:33:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 4461. [2021-12-16 02:33:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4461 states, 3537 states have (on average 1.2731128074639526) internal successors, (4503), 3585 states have internal predecessors, (4503), 463 states have call successors, (463), 380 states have call predecessors, (463), 459 states have return successors, (634), 498 states have call predecessors, (634), 460 states have call successors, (634) [2021-12-16 02:33:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4461 states to 4461 states and 5600 transitions. [2021-12-16 02:33:10,530 INFO L78 Accepts]: Start accepts. Automaton has 4461 states and 5600 transitions. Word has length 73 [2021-12-16 02:33:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:10,531 INFO L470 AbstractCegarLoop]: Abstraction has 4461 states and 5600 transitions. [2021-12-16 02:33:10,531 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) [2021-12-16 02:33:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4461 states and 5600 transitions. [2021-12-16 02:33:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 02:33:10,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:10,532 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] [2021-12-16 02:33:10,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 02:33:10,533 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:10,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:10,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1069513385, now seen corresponding path program 1 times [2021-12-16 02:33:10,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:10,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336182097] [2021-12-16 02:33:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:10,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:10,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:10,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:10,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:10,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:10,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:10,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:10,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:10,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:10,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336182097] [2021-12-16 02:33:10,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336182097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:33:10,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244525449] [2021-12-16 02:33:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:10,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:33:10,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:33:10,632 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) [2021-12-16 02:33:10,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:33:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 02:33:10,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:33:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:11,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:33:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:11,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244525449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:33:11,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:33:11,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-16 02:33:11,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461454237] [2021-12-16 02:33:11,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:33:11,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 02:33:11,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 02:33:11,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:33:11,274 INFO L87 Difference]: Start difference. First operand 4461 states and 5600 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) [2021-12-16 02:33:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:12,690 INFO L93 Difference]: Finished difference Result 8779 states and 10809 transitions. [2021-12-16 02:33:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 02:33:12,691 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 [2021-12-16 02:33:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:12,719 INFO L225 Difference]: With dead ends: 8779 [2021-12-16 02:33:12,720 INFO L226 Difference]: Without dead ends: 8776 [2021-12-16 02:33:12,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-16 02:33:12,724 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 2377 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2441 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:12,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2441 Valid, 2541 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 02:33:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8776 states. [2021-12-16 02:33:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8776 to 7878. [2021-12-16 02:33:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7878 states, 6212 states have (on average 1.2533805537669027) internal successors, (7786), 6295 states have internal predecessors, (7786), 822 states have call successors, (822), 694 states have call predecessors, (822), 842 states have return successors, (1135), 891 states have call predecessors, (1135), 819 states have call successors, (1135) [2021-12-16 02:33:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7878 states to 7878 states and 9743 transitions. [2021-12-16 02:33:13,004 INFO L78 Accepts]: Start accepts. Automaton has 7878 states and 9743 transitions. Word has length 74 [2021-12-16 02:33:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:13,004 INFO L470 AbstractCegarLoop]: Abstraction has 7878 states and 9743 transitions. [2021-12-16 02:33:13,004 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) [2021-12-16 02:33:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7878 states and 9743 transitions. [2021-12-16 02:33:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 02:33:13,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:13,006 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] [2021-12-16 02:33:13,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:33:13,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 02:33:13,220 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash 850950662, now seen corresponding path program 2 times [2021-12-16 02:33:13,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:13,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742272275] [2021-12-16 02:33:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:13,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:13,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:13,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742272275] [2021-12-16 02:33:13,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742272275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:13,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:13,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:33:13,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264392060] [2021-12-16 02:33:13,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:13,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:33:13,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:13,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:33:13,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:33:13,272 INFO L87 Difference]: Start difference. First operand 7878 states and 9743 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) [2021-12-16 02:33:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:13,665 INFO L93 Difference]: Finished difference Result 10472 states and 12952 transitions. [2021-12-16 02:33:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:33:13,666 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 [2021-12-16 02:33:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:13,682 INFO L225 Difference]: With dead ends: 10472 [2021-12-16 02:33:13,707 INFO L226 Difference]: Without dead ends: 4298 [2021-12-16 02:33:13,716 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 [2021-12-16 02:33:13,717 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 1318 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:13,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 1884 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:33:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-12-16 02:33:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3290. [2021-12-16 02:33:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 2630 states have (on average 1.2688212927756655) internal successors, (3337), 2659 states have internal predecessors, (3337), 341 states have call successors, (341), 276 states have call predecessors, (341), 317 states have return successors, (434), 357 states have call predecessors, (434), 338 states have call successors, (434) [2021-12-16 02:33:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4112 transitions. [2021-12-16 02:33:13,818 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4112 transitions. Word has length 77 [2021-12-16 02:33:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:13,818 INFO L470 AbstractCegarLoop]: Abstraction has 3290 states and 4112 transitions. [2021-12-16 02:33:13,819 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) [2021-12-16 02:33:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4112 transitions. [2021-12-16 02:33:13,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-16 02:33:13,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:13,820 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] [2021-12-16 02:33:13,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 02:33:13,821 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash -416080695, now seen corresponding path program 1 times [2021-12-16 02:33:13,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:13,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125699890] [2021-12-16 02:33:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:13,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 02:33:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:33:13,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125699890] [2021-12-16 02:33:13,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125699890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:13,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:13,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:33:13,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612735687] [2021-12-16 02:33:13,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:13,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:33:13,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:13,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:33:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:33:13,880 INFO L87 Difference]: Start difference. First operand 3290 states and 4112 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) [2021-12-16 02:33:14,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:14,845 INFO L93 Difference]: Finished difference Result 9074 states and 11109 transitions. [2021-12-16 02:33:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 02:33:14,846 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 [2021-12-16 02:33:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:14,858 INFO L225 Difference]: With dead ends: 9074 [2021-12-16 02:33:14,859 INFO L226 Difference]: Without dead ends: 5376 [2021-12-16 02:33:14,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-16 02:33:14,866 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 1894 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:14,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 2213 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 02:33:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-12-16 02:33:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 5116. [2021-12-16 02:33:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5116 states, 4021 states have (on average 1.2302909723949267) internal successors, (4947), 4087 states have internal predecessors, (4947), 541 states have call successors, (541), 448 states have call predecessors, (541), 552 states have return successors, (784), 583 states have call predecessors, (784), 538 states have call successors, (784) [2021-12-16 02:33:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 6272 transitions. [2021-12-16 02:33:15,038 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 6272 transitions. Word has length 84 [2021-12-16 02:33:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:15,039 INFO L470 AbstractCegarLoop]: Abstraction has 5116 states and 6272 transitions. [2021-12-16 02:33:15,039 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) [2021-12-16 02:33:15,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 6272 transitions. [2021-12-16 02:33:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 02:33:15,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:15,041 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] [2021-12-16 02:33:15,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 02:33:15,041 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:15,042 INFO L85 PathProgramCache]: Analyzing trace with hash 322850660, now seen corresponding path program 1 times [2021-12-16 02:33:15,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:15,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807365927] [2021-12-16 02:33:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:15,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:15,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:15,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:15,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:15,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:15,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:15,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:15,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:15,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:33:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 02:33:15,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:15,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807365927] [2021-12-16 02:33:15,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807365927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:15,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:15,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 02:33:15,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599463947] [2021-12-16 02:33:15,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:15,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 02:33:15,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:15,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 02:33:15,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:33:15,111 INFO L87 Difference]: Start difference. First operand 5116 states and 6272 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) [2021-12-16 02:33:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:16,225 INFO L93 Difference]: Finished difference Result 8476 states and 10290 transitions. [2021-12-16 02:33:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 02:33:16,226 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 [2021-12-16 02:33:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:16,234 INFO L225 Difference]: With dead ends: 8476 [2021-12-16 02:33:16,235 INFO L226 Difference]: Without dead ends: 4277 [2021-12-16 02:33:16,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-16 02:33:16,240 INFO L933 BasicCegarLoop]: 754 mSDtfsCounter, 1953 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:16,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 2569 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 02:33:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2021-12-16 02:33:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 3856. [2021-12-16 02:33:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3856 states, 3027 states have (on average 1.2226627023455567) internal successors, (3701), 3081 states have internal predecessors, (3701), 406 states have call successors, (406), 330 states have call predecessors, (406), 421 states have return successors, (553), 447 states have call predecessors, (553), 403 states have call successors, (553) [2021-12-16 02:33:16,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3856 states to 3856 states and 4660 transitions. [2021-12-16 02:33:16,346 INFO L78 Accepts]: Start accepts. Automaton has 3856 states and 4660 transitions. Word has length 93 [2021-12-16 02:33:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:16,347 INFO L470 AbstractCegarLoop]: Abstraction has 3856 states and 4660 transitions. [2021-12-16 02:33:16,347 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) [2021-12-16 02:33:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3856 states and 4660 transitions. [2021-12-16 02:33:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-16 02:33:16,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:16,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:16,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 02:33:16,350 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:16,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1648604991, now seen corresponding path program 1 times [2021-12-16 02:33:16,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:16,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811187259] [2021-12-16 02:33:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:16,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 02:33:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:33:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 02:33:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 02:33:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-16 02:33:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 02:33:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-16 02:33:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-16 02:33:16,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:16,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811187259] [2021-12-16 02:33:16,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811187259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:33:16,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422026705] [2021-12-16 02:33:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:16,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:33:16,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:33:16,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:33:16,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:33:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:16,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 02:33:16,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:33:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 02:33:16,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:33:16,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422026705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:16,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:33:16,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-16 02:33:16,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155025842] [2021-12-16 02:33:16,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:16,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:33:16,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:16,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:33:16,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-16 02:33:16,727 INFO L87 Difference]: Start difference. First operand 3856 states and 4660 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 02:33:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:16,837 INFO L93 Difference]: Finished difference Result 5731 states and 6899 transitions. [2021-12-16 02:33:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:33:16,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-16 02:33:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:16,842 INFO L225 Difference]: With dead ends: 5731 [2021-12-16 02:33:16,842 INFO L226 Difference]: Without dead ends: 2272 [2021-12-16 02:33:16,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 02:33:16,848 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 34 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3623 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:16,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3623 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:33:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-12-16 02:33:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2150. [2021-12-16 02:33:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 1767 states have (on average 1.2512733446519524) internal successors, (2211), 1784 states have internal predecessors, (2211), 195 states have call successors, (195), 144 states have call predecessors, (195), 186 states have return successors, (260), 222 states have call predecessors, (260), 192 states have call successors, (260) [2021-12-16 02:33:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 2666 transitions. [2021-12-16 02:33:16,910 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 2666 transitions. Word has length 145 [2021-12-16 02:33:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:16,910 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 2666 transitions. [2021-12-16 02:33:16,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 02:33:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 2666 transitions. [2021-12-16 02:33:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-16 02:33:16,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:16,913 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-16 02:33:16,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:33:17,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 02:33:17,127 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2137728743, now seen corresponding path program 1 times [2021-12-16 02:33:17,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:17,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138370795] [2021-12-16 02:33:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:17,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 02:33:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 02:33:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 02:33:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 02:33:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-16 02:33:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-16 02:33:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-16 02:33:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-16 02:33:17,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:17,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138370795] [2021-12-16 02:33:17,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138370795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:17,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:17,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:33:17,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419907640] [2021-12-16 02:33:17,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:17,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:33:17,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:17,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:33:17,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:33:17,184 INFO L87 Difference]: Start difference. First operand 2150 states and 2666 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 02:33:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:17,631 INFO L93 Difference]: Finished difference Result 2198 states and 2716 transitions. [2021-12-16 02:33:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:33:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-16 02:33:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:17,636 INFO L225 Difference]: With dead ends: 2198 [2021-12-16 02:33:17,636 INFO L226 Difference]: Without dead ends: 1824 [2021-12-16 02:33:17,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:33:17,637 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 1068 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:17,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1080 Valid, 1696 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 02:33:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-12-16 02:33:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1779. [2021-12-16 02:33:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1480 states have (on average 1.2736486486486487) internal successors, (1885), 1494 states have internal predecessors, (1885), 154 states have call successors, (154), 109 states have call predecessors, (154), 143 states have return successors, (205), 176 states have call predecessors, (205), 151 states have call successors, (205) [2021-12-16 02:33:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 2244 transitions. [2021-12-16 02:33:17,710 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 2244 transitions. Word has length 147 [2021-12-16 02:33:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:17,710 INFO L470 AbstractCegarLoop]: Abstraction has 1779 states and 2244 transitions. [2021-12-16 02:33:17,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 02:33:17,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 2244 transitions. [2021-12-16 02:33:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-16 02:33:17,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:17,713 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:17,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 02:33:17,713 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:17,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:17,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2127164153, now seen corresponding path program 1 times [2021-12-16 02:33:17,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:17,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894120022] [2021-12-16 02:33:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:17,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 02:33:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:33:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 02:33:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 02:33:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-16 02:33:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-16 02:33:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-16 02:33:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 02:33:17,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894120022] [2021-12-16 02:33:17,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894120022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:17,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:17,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:17,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547500118] [2021-12-16 02:33:17,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:17,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:17,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:17,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:17,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:17,796 INFO L87 Difference]: Start difference. First operand 1779 states and 2244 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-16 02:33:18,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:18,437 INFO L93 Difference]: Finished difference Result 3045 states and 3743 transitions. [2021-12-16 02:33:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:33:18,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-16 02:33:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:18,442 INFO L225 Difference]: With dead ends: 3045 [2021-12-16 02:33:18,442 INFO L226 Difference]: Without dead ends: 1752 [2021-12-16 02:33:18,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:33:18,445 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 681 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:18,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 2550 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 02:33:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-12-16 02:33:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1668. [2021-12-16 02:33:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1393 states have (on average 1.2835606604450827) internal successors, (1788), 1407 states have internal predecessors, (1788), 142 states have call successors, (142), 99 states have call predecessors, (142), 131 states have return successors, (187), 162 states have call predecessors, (187), 139 states have call successors, (187) [2021-12-16 02:33:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2117 transitions. [2021-12-16 02:33:18,489 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2117 transitions. Word has length 159 [2021-12-16 02:33:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:18,489 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 2117 transitions. [2021-12-16 02:33:18,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-16 02:33:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2117 transitions. [2021-12-16 02:33:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 02:33:18,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:18,491 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:18,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 02:33:18,491 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:18,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1961116033, now seen corresponding path program 1 times [2021-12-16 02:33:18,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:18,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014990796] [2021-12-16 02:33:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:18,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:33:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:33:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:33:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:33:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 02:33:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:33:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-16 02:33:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-16 02:33:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:33:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:33:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-16 02:33:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-16 02:33:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-16 02:33:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 02:33:18,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:18,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014990796] [2021-12-16 02:33:18,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014990796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:33:18,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356779530] [2021-12-16 02:33:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:18,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:33:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:33:18,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:33:18,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:33:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:18,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 02:33:18,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:33:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 02:33:18,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:33:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-16 02:33:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356779530] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:33:19,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:33:19,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-16 02:33:19,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995925995] [2021-12-16 02:33:19,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:33:19,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 02:33:19,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 02:33:19,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-16 02:33:19,232 INFO L87 Difference]: Start difference. First operand 1668 states and 2117 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-16 02:33:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:20,233 INFO L93 Difference]: Finished difference Result 3404 states and 4256 transitions. [2021-12-16 02:33:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 02:33:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-16 02:33:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:20,238 INFO L225 Difference]: With dead ends: 3404 [2021-12-16 02:33:20,238 INFO L226 Difference]: Without dead ends: 2059 [2021-12-16 02:33:20,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 354 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-16 02:33:20,240 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 2456 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2487 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:20,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2487 Valid, 2053 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 02:33:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-12-16 02:33:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1946. [2021-12-16 02:33:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1596 states have (on average 1.2474937343358397) internal successors, (1991), 1611 states have internal predecessors, (1991), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2021-12-16 02:33:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2429 transitions. [2021-12-16 02:33:20,295 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2429 transitions. Word has length 162 [2021-12-16 02:33:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:20,295 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2429 transitions. [2021-12-16 02:33:20,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-16 02:33:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2429 transitions. [2021-12-16 02:33:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:20,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:20,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:20,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:33:20,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 02:33:20,519 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:20,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1484709716, now seen corresponding path program 1 times [2021-12-16 02:33:20,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:20,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506493702] [2021-12-16 02:33:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:20,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:20,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:20,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:20,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:20,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:20,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:20,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:20,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506493702] [2021-12-16 02:33:20,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506493702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:20,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:20,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:33:20,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963676868] [2021-12-16 02:33:20,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:20,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:33:20,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:20,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:33:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:33:20,634 INFO L87 Difference]: Start difference. First operand 1946 states and 2429 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:21,950 INFO L93 Difference]: Finished difference Result 2461 states and 3263 transitions. [2021-12-16 02:33:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:33:21,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-16 02:33:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:21,956 INFO L225 Difference]: With dead ends: 2461 [2021-12-16 02:33:21,957 INFO L226 Difference]: Without dead ends: 2088 [2021-12-16 02:33:21,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:33:21,959 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 1139 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:21,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 1388 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 02:33:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-12-16 02:33:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1946. [2021-12-16 02:33:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1596 states have (on average 1.2468671679197996) internal successors, (1990), 1611 states have internal predecessors, (1990), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2021-12-16 02:33:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2428 transitions. [2021-12-16 02:33:22,080 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2428 transitions. Word has length 179 [2021-12-16 02:33:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:22,080 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2428 transitions. [2021-12-16 02:33:22,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2428 transitions. [2021-12-16 02:33:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:22,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:22,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:22,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 02:33:22,084 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:22,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash -794878226, now seen corresponding path program 1 times [2021-12-16 02:33:22,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:22,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050558878] [2021-12-16 02:33:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:22,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:22,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:22,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:22,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:22,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:22,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:22,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:22,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050558878] [2021-12-16 02:33:22,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050558878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:22,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:22,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:33:22,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398400741] [2021-12-16 02:33:22,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:22,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:33:22,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:22,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:33:22,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:33:22,203 INFO L87 Difference]: Start difference. First operand 1946 states and 2428 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:23,437 INFO L93 Difference]: Finished difference Result 2453 states and 3246 transitions. [2021-12-16 02:33:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:33:23,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-16 02:33:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:23,441 INFO L225 Difference]: With dead ends: 2453 [2021-12-16 02:33:23,441 INFO L226 Difference]: Without dead ends: 2088 [2021-12-16 02:33:23,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:33:23,443 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 1130 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:23,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 1386 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 02:33:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-12-16 02:33:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1946. [2021-12-16 02:33:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1596 states have (on average 1.2462406015037595) internal successors, (1989), 1611 states have internal predecessors, (1989), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2021-12-16 02:33:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2427 transitions. [2021-12-16 02:33:23,530 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2427 transitions. Word has length 179 [2021-12-16 02:33:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:23,530 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2427 transitions. [2021-12-16 02:33:23,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2427 transitions. [2021-12-16 02:33:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:23,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:23,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:23,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 02:33:23,533 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:23,533 INFO L85 PathProgramCache]: Analyzing trace with hash -8880336, now seen corresponding path program 1 times [2021-12-16 02:33:23,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:23,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197618697] [2021-12-16 02:33:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:23,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:23,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:23,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:23,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:23,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:23,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:23,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:23,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197618697] [2021-12-16 02:33:23,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197618697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:23,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:23,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:33:23,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38187268] [2021-12-16 02:33:23,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:23,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:33:23,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:33:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:33:23,644 INFO L87 Difference]: Start difference. First operand 1946 states and 2427 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:25,879 INFO L93 Difference]: Finished difference Result 2972 states and 4090 transitions. [2021-12-16 02:33:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:33:25,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-16 02:33:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:25,884 INFO L225 Difference]: With dead ends: 2972 [2021-12-16 02:33:25,884 INFO L226 Difference]: Without dead ends: 2610 [2021-12-16 02:33:25,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:33:25,885 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 1785 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:25,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1814 Valid, 2009 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-16 02:33:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2021-12-16 02:33:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2325. [2021-12-16 02:33:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 1947 states have (on average 1.310220852593734) internal successors, (2551), 1963 states have internal predecessors, (2551), 203 states have call successors, (203), 143 states have call predecessors, (203), 173 states have return successors, (280), 219 states have call predecessors, (280), 200 states have call successors, (280) [2021-12-16 02:33:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 3034 transitions. [2021-12-16 02:33:25,999 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 3034 transitions. Word has length 179 [2021-12-16 02:33:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:25,999 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 3034 transitions. [2021-12-16 02:33:25,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:26,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 3034 transitions. [2021-12-16 02:33:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:26,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:26,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:26,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 02:33:26,003 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1394620116, now seen corresponding path program 1 times [2021-12-16 02:33:26,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:26,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489290154] [2021-12-16 02:33:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:26,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:26,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:26,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:26,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:26,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:26,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:26,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:26,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489290154] [2021-12-16 02:33:26,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489290154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:26,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:26,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:26,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086471537] [2021-12-16 02:33:26,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:26,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:26,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:26,108 INFO L87 Difference]: Start difference. First operand 2325 states and 3034 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:29,000 INFO L93 Difference]: Finished difference Result 3893 states and 5582 transitions. [2021-12-16 02:33:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:33:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-16 02:33:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:29,010 INFO L225 Difference]: With dead ends: 3893 [2021-12-16 02:33:29,010 INFO L226 Difference]: Without dead ends: 3152 [2021-12-16 02:33:29,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:33:29,014 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 1817 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 3245 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 3323 SdHoareTripleChecker+Invalid, 3369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:29,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1846 Valid, 3323 Invalid, 3369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3245 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 02:33:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-12-16 02:33:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2678. [2021-12-16 02:33:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2272 states have (on average 1.3472711267605635) internal successors, (3061), 2289 states have internal predecessors, (3061), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2021-12-16 02:33:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3588 transitions. [2021-12-16 02:33:29,145 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3588 transitions. Word has length 179 [2021-12-16 02:33:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:29,146 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3588 transitions. [2021-12-16 02:33:29,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3588 transitions. [2021-12-16 02:33:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:29,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:29,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:29,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-16 02:33:29,149 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2005889174, now seen corresponding path program 1 times [2021-12-16 02:33:29,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:29,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688741079] [2021-12-16 02:33:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:29,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:29,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:29,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:29,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:29,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:29,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:29,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:29,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688741079] [2021-12-16 02:33:29,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688741079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:29,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:29,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:29,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866332301] [2021-12-16 02:33:29,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:29,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:29,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:29,254 INFO L87 Difference]: Start difference. First operand 2678 states and 3588 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:32,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:32,089 INFO L93 Difference]: Finished difference Result 5249 states and 7756 transitions. [2021-12-16 02:33:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:33:32,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-16 02:33:32,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:32,098 INFO L225 Difference]: With dead ends: 5249 [2021-12-16 02:33:32,099 INFO L226 Difference]: Without dead ends: 4155 [2021-12-16 02:33:32,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:33:32,102 INFO L933 BasicCegarLoop]: 1125 mSDtfsCounter, 1812 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 3236 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1841 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 3361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:32,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1841 Valid, 3312 Invalid, 3361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3236 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 02:33:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-12-16 02:33:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3387. [2021-12-16 02:33:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 2925 states have (on average 1.396923076923077) internal successors, (4086), 2944 states have internal predecessors, (4086), 266 states have call successors, (266), 161 states have call predecessors, (266), 194 states have return successors, (353), 285 states have call predecessors, (353), 263 states have call successors, (353) [2021-12-16 02:33:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4705 transitions. [2021-12-16 02:33:32,274 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4705 transitions. Word has length 179 [2021-12-16 02:33:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:32,274 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4705 transitions. [2021-12-16 02:33:32,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4705 transitions. [2021-12-16 02:33:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:32,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:32,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:32,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-16 02:33:32,277 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash 883886444, now seen corresponding path program 1 times [2021-12-16 02:33:32,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:32,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981511643] [2021-12-16 02:33:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:32,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:32,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:32,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:32,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:32,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:32,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:32,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:32,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981511643] [2021-12-16 02:33:32,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981511643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:32,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:32,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:32,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303185852] [2021-12-16 02:33:32,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:32,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:32,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:32,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:32,370 INFO L87 Difference]: Start difference. First operand 3387 states and 4705 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:35,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:35,325 INFO L93 Difference]: Finished difference Result 7864 states and 11925 transitions. [2021-12-16 02:33:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:33:35,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-16 02:33:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:35,338 INFO L225 Difference]: With dead ends: 7864 [2021-12-16 02:33:35,338 INFO L226 Difference]: Without dead ends: 6061 [2021-12-16 02:33:35,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:33:35,343 INFO L933 BasicCegarLoop]: 1120 mSDtfsCounter, 1811 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 3228 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 3307 SdHoareTripleChecker+Invalid, 3353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:35,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1840 Valid, 3307 Invalid, 3353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3228 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 02:33:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-12-16 02:33:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4808. [2021-12-16 02:33:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4808 states, 4234 states have (on average 1.4501653282947566) internal successors, (6140), 4257 states have internal predecessors, (6140), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2021-12-16 02:33:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4808 states to 4808 states and 6949 transitions. [2021-12-16 02:33:35,571 INFO L78 Accepts]: Start accepts. Automaton has 4808 states and 6949 transitions. Word has length 179 [2021-12-16 02:33:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:35,571 INFO L470 AbstractCegarLoop]: Abstraction has 4808 states and 6949 transitions. [2021-12-16 02:33:35,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4808 states and 6949 transitions. [2021-12-16 02:33:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:35,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:35,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:35,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-16 02:33:35,601 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1516746966, now seen corresponding path program 1 times [2021-12-16 02:33:35,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:35,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727206396] [2021-12-16 02:33:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:35,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:35,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:35,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:35,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:35,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:35,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:35,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:35,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727206396] [2021-12-16 02:33:35,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727206396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:35,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:35,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:35,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417968747] [2021-12-16 02:33:35,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:35,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:35,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:35,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:35,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:35,697 INFO L87 Difference]: Start difference. First operand 4808 states and 6949 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:38,996 INFO L93 Difference]: Finished difference Result 13095 states and 20283 transitions. [2021-12-16 02:33:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:33:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-16 02:33:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:39,018 INFO L225 Difference]: With dead ends: 13095 [2021-12-16 02:33:39,018 INFO L226 Difference]: Without dead ends: 9871 [2021-12-16 02:33:39,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:33:39,027 INFO L933 BasicCegarLoop]: 1115 mSDtfsCounter, 1810 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 3220 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1839 SdHoareTripleChecker+Valid, 3302 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:39,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1839 Valid, 3302 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3220 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 02:33:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9871 states. [2021-12-16 02:33:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9871 to 7657. [2021-12-16 02:33:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7657 states, 6859 states have (on average 1.4955532876512612) internal successors, (10258), 6890 states have internal predecessors, (10258), 518 states have call successors, (518), 233 states have call predecessors, (518), 278 states have return successors, (689), 549 states have call predecessors, (689), 515 states have call successors, (689) [2021-12-16 02:33:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 11465 transitions. [2021-12-16 02:33:39,443 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 11465 transitions. Word has length 179 [2021-12-16 02:33:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:39,444 INFO L470 AbstractCegarLoop]: Abstraction has 7657 states and 11465 transitions. [2021-12-16 02:33:39,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 11465 transitions. [2021-12-16 02:33:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:39,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:39,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:39,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-16 02:33:39,448 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:39,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash -70166100, now seen corresponding path program 1 times [2021-12-16 02:33:39,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:39,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414052507] [2021-12-16 02:33:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:39,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:39,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:39,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:39,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:39,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:39,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:39,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414052507] [2021-12-16 02:33:39,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414052507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:39,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:39,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:39,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113716389] [2021-12-16 02:33:39,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:39,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:39,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:39,543 INFO L87 Difference]: Start difference. First operand 7657 states and 11465 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:43,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:43,023 INFO L93 Difference]: Finished difference Result 23558 states and 37061 transitions. [2021-12-16 02:33:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:33:43,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-16 02:33:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:43,063 INFO L225 Difference]: With dead ends: 23558 [2021-12-16 02:33:43,063 INFO L226 Difference]: Without dead ends: 17485 [2021-12-16 02:33:43,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:33:43,082 INFO L933 BasicCegarLoop]: 1110 mSDtfsCounter, 1809 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 3212 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1838 SdHoareTripleChecker+Valid, 3297 SdHoareTripleChecker+Invalid, 3337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:43,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1838 Valid, 3297 Invalid, 3337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3212 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 02:33:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17485 states. [2021-12-16 02:33:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17485 to 13370. [2021-12-16 02:33:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13370 states, 12124 states have (on average 1.5272187396898713) internal successors, (18516), 12171 states have internal predecessors, (18516), 854 states have call successors, (854), 329 states have call predecessors, (854), 390 states have return successors, (1203), 901 states have call predecessors, (1203), 851 states have call successors, (1203) [2021-12-16 02:33:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13370 states to 13370 states and 20573 transitions. [2021-12-16 02:33:43,783 INFO L78 Accepts]: Start accepts. Automaton has 13370 states and 20573 transitions. Word has length 179 [2021-12-16 02:33:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:43,783 INFO L470 AbstractCegarLoop]: Abstraction has 13370 states and 20573 transitions. [2021-12-16 02:33:43,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 13370 states and 20573 transitions. [2021-12-16 02:33:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:43,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:43,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:43,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-16 02:33:43,790 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:43,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash -993333526, now seen corresponding path program 1 times [2021-12-16 02:33:43,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:43,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102003952] [2021-12-16 02:33:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:43,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:43,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:43,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:43,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:43,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:43,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:43,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:43,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102003952] [2021-12-16 02:33:43,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102003952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:43,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:43,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:43,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082389526] [2021-12-16 02:33:43,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:43,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:43,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:43,897 INFO L87 Difference]: Start difference. First operand 13370 states and 20573 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:33:48,316 INFO L93 Difference]: Finished difference Result 44485 states and 70811 transitions. [2021-12-16 02:33:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:33:48,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-16 02:33:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:33:48,399 INFO L225 Difference]: With dead ends: 44485 [2021-12-16 02:33:48,399 INFO L226 Difference]: Without dead ends: 32699 [2021-12-16 02:33:48,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:33:48,431 INFO L933 BasicCegarLoop]: 1105 mSDtfsCounter, 1808 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1837 SdHoareTripleChecker+Valid, 3292 SdHoareTripleChecker+Invalid, 3329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:33:48,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1837 Valid, 3292 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 02:33:48,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32699 states. [2021-12-16 02:33:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32699 to 24827. [2021-12-16 02:33:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24827 states, 22685 states have (on average 1.5463081331276174) internal successors, (35078), 22764 states have internal predecessors, (35078), 1526 states have call successors, (1526), 521 states have call predecessors, (1526), 614 states have return successors, (2393), 1605 states have call predecessors, (2393), 1523 states have call successors, (2393) [2021-12-16 02:33:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24827 states to 24827 states and 38997 transitions. [2021-12-16 02:33:49,873 INFO L78 Accepts]: Start accepts. Automaton has 24827 states and 38997 transitions. Word has length 179 [2021-12-16 02:33:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:33:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 24827 states and 38997 transitions. [2021-12-16 02:33:49,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:33:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 24827 states and 38997 transitions. [2021-12-16 02:33:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 02:33:49,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:33:49,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:33:49,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-16 02:33:49,886 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:33:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:33:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash -607471124, now seen corresponding path program 1 times [2021-12-16 02:33:49,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:33:49,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659799978] [2021-12-16 02:33:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:33:49,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:33:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:49,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:33:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:49,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 02:33:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:49,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 02:33:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:49,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 02:33:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:49,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-16 02:33:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:33:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:33:49,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:33:49,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659799978] [2021-12-16 02:33:49,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659799978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:33:49,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:33:49,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:33:49,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737021269] [2021-12-16 02:33:49,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:33:49,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:33:49,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:33:49,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:33:49,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:33:49,986 INFO L87 Difference]: Start difference. First operand 24827 states and 38997 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)