./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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.13.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:52:26,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:52:26,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:52:26,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:52:26,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:52:26,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:52:26,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:52:26,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:52:26,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:52:26,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:52:26,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:52:26,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:52:26,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:52:26,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:52:26,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:52:26,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:52:26,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:52:26,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:52:26,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:52:26,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:52:26,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:52:26,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:52:26,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:52:26,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:52:26,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:52:26,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:52:26,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:52:26,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:52:26,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:52:26,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:52:26,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:52:26,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:52:26,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:52:26,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:52:26,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:52:26,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:52:26,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:52:26,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:52:26,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:52:26,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:52:26,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:52:26,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:52:26,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:52:26,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:52:26,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:52:26,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:52:26,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:52:26,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:52:26,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:52:26,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:52:26,556 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:52:26,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:52:26,557 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:52:26,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:52:26,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:52:26,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:52:26,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:52:26,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:52:26,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:52:26,558 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:52:26,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:52:26,558 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:52:26,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:52:26,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:52:26,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:52:26,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:52:26,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:52:26,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:52:26,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:52:26,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:52:26,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:52:26,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:52:26,560 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:52:26,560 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:52:26,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:52:26,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:52:26,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f [2021-12-21 14:52:26,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:52:26,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:52:26,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:52:26,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:52:26,755 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:52:26,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-12-21 14:52:26,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdfd91118/85390c32f2a04ae89d6ceb2de9b2b82f/FLAG51427fb4f [2021-12-21 14:52:27,145 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:52:27,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-12-21 14:52:27,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdfd91118/85390c32f2a04ae89d6ceb2de9b2b82f/FLAG51427fb4f [2021-12-21 14:52:27,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdfd91118/85390c32f2a04ae89d6ceb2de9b2b82f [2021-12-21 14:52:27,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:52:27,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:52:27,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:52:27,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:52:27,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:52:27,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:27,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d1be711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27, skipping insertion in model container [2021-12-21 14:52:27,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:27,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:52:27,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:52:27,739 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.13.cil-1.c[914,927] [2021-12-21 14:52:27,770 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.13.cil-1.c[7115,7128] [2021-12-21 14:52:27,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:52:27,882 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:52:27,903 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.13.cil-1.c[914,927] [2021-12-21 14:52:27,943 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.13.cil-1.c[7115,7128] [2021-12-21 14:52:27,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:52:27,992 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:52:27,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27 WrapperNode [2021-12-21 14:52:27,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:52:27,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:52:27,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:52:27,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:52:28,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,060 INFO L137 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1103 [2021-12-21 14:52:28,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:52:28,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:52:28,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:52:28,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:52:28,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:52:28,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:52:28,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:52:28,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:52:28,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (1/1) ... [2021-12-21 14:52:28,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:52:28,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:52:28,148 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) [2021-12-21 14:52:28,155 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 [2021-12-21 14:52:28,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:52:28,188 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:52:28,188 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:52:28,188 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-21 14:52:28,189 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-21 14:52:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:52:28,190 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:52:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:52:28,190 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:52:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-21 14:52:28,190 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-21 14:52:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:52:28,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:52:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:52:28,191 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:52:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-21 14:52:28,191 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-21 14:52:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-21 14:52:28,191 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-21 14:52:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-21 14:52:28,192 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-21 14:52:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:52:28,192 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:52:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:52:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:52:28,192 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:52:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-21 14:52:28,192 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-21 14:52:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:52:28,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:52:28,193 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:52:28,193 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:52:28,193 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-21 14:52:28,193 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-21 14:52:28,316 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:52:28,317 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:52:29,053 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:52:29,063 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:52:29,064 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-12-21 14:52:29,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:52:29 BoogieIcfgContainer [2021-12-21 14:52:29,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:52:29,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:52:29,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:52:29,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:52:29,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:52:27" (1/3) ... [2021-12-21 14:52:29,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732ffe12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:52:29, skipping insertion in model container [2021-12-21 14:52:29,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:27" (2/3) ... [2021-12-21 14:52:29,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732ffe12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:52:29, skipping insertion in model container [2021-12-21 14:52:29,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:52:29" (3/3) ... [2021-12-21 14:52:29,074 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-12-21 14:52:29,078 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:52:29,078 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:52:29,111 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:52:29,117 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 [2021-12-21 14:52:29,117 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:52:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 516 states, 455 states have (on average 1.6483516483516483) internal successors, (750), 463 states have internal predecessors, (750), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-21 14:52:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:29,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:29,145 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] [2021-12-21 14:52:29,145 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1743097905, now seen corresponding path program 1 times [2021-12-21 14:52:29,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:29,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974093458] [2021-12-21 14:52:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:29,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:29,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:29,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974093458] [2021-12-21 14:52:29,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974093458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:29,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:29,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:52:29,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996589459] [2021-12-21 14:52:29,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:29,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:52:29,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:29,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:52:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:52:29,512 INFO L87 Difference]: Start difference. First operand has 516 states, 455 states have (on average 1.6483516483516483) internal successors, (750), 463 states have internal predecessors, (750), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) 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) [2021-12-21 14:52:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:30,417 INFO L93 Difference]: Finished difference Result 1137 states and 1828 transitions. [2021-12-21 14:52:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:30,419 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 [2021-12-21 14:52:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:30,438 INFO L225 Difference]: With dead ends: 1137 [2021-12-21 14:52:30,438 INFO L226 Difference]: Without dead ends: 640 [2021-12-21 14:52:30,446 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 [2021-12-21 14:52:30,448 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 1258 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:30,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1263 Valid, 2332 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-12-21 14:52:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 601. [2021-12-21 14:52:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 523 states have (on average 1.5353728489483747) internal successors, (803), 530 states have internal predecessors, (803), 54 states have call successors, (54), 22 states have call predecessors, (54), 22 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-21 14:52:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 912 transitions. [2021-12-21 14:52:30,538 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 912 transitions. Word has length 65 [2021-12-21 14:52:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:30,538 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 912 transitions. [2021-12-21 14:52:30,538 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) [2021-12-21 14:52:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 912 transitions. [2021-12-21 14:52:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:30,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:30,541 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] [2021-12-21 14:52:30,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:52:30,542 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:30,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:30,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2146883856, now seen corresponding path program 1 times [2021-12-21 14:52:30,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:30,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879382503] [2021-12-21 14:52:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:30,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:30,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:30,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879382503] [2021-12-21 14:52:30,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879382503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:30,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:30,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:52:30,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122523397] [2021-12-21 14:52:30,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:30,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:52:30,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:52:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:52:30,730 INFO L87 Difference]: Start difference. First operand 601 states and 912 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) [2021-12-21 14:52:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:31,627 INFO L93 Difference]: Finished difference Result 815 states and 1206 transitions. [2021-12-21 14:52:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:52:31,627 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 [2021-12-21 14:52:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:31,630 INFO L225 Difference]: With dead ends: 815 [2021-12-21 14:52:31,631 INFO L226 Difference]: Without dead ends: 638 [2021-12-21 14:52:31,631 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 [2021-12-21 14:52:31,632 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 692 mSDsluCounter, 2836 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 3604 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:31,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 3604 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:52:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-21 14:52:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 606. [2021-12-21 14:52:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 527 states have (on average 1.5294117647058822) internal successors, (806), 534 states have internal predecessors, (806), 54 states have call successors, (54), 22 states have call predecessors, (54), 23 states have return successors, (56), 52 states have call predecessors, (56), 50 states have call successors, (56) [2021-12-21 14:52:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 916 transitions. [2021-12-21 14:52:31,657 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 916 transitions. Word has length 65 [2021-12-21 14:52:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:31,657 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 916 transitions. [2021-12-21 14:52:31,657 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) [2021-12-21 14:52:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 916 transitions. [2021-12-21 14:52:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:31,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:31,671 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] [2021-12-21 14:52:31,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:52:31,672 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:31,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1117524558, now seen corresponding path program 1 times [2021-12-21 14:52:31,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:31,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322356220] [2021-12-21 14:52:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:31,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:31,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322356220] [2021-12-21 14:52:31,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322356220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:31,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:31,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 14:52:31,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582516557] [2021-12-21 14:52:31,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:31,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:52:31,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:31,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:52:31,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:52:31,804 INFO L87 Difference]: Start difference. First operand 606 states and 916 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) [2021-12-21 14:52:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:33,273 INFO L93 Difference]: Finished difference Result 1506 states and 2135 transitions. [2021-12-21 14:52:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 14:52:33,274 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 [2021-12-21 14:52:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:33,279 INFO L225 Difference]: With dead ends: 1506 [2021-12-21 14:52:33,279 INFO L226 Difference]: Without dead ends: 1312 [2021-12-21 14:52:33,280 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 [2021-12-21 14:52:33,281 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 3815 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3831 SdHoareTripleChecker+Valid, 3217 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:33,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3831 Valid, 3217 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:52:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-12-21 14:52:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1187. [2021-12-21 14:52:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 989 states have (on average 1.435793731041456) internal successors, (1420), 1004 states have internal predecessors, (1420), 111 states have call successors, (111), 75 states have call predecessors, (111), 85 states have return successors, (125), 109 states have call predecessors, (125), 107 states have call successors, (125) [2021-12-21 14:52:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1656 transitions. [2021-12-21 14:52:33,322 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1656 transitions. Word has length 65 [2021-12-21 14:52:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:33,323 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1656 transitions. [2021-12-21 14:52:33,323 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) [2021-12-21 14:52:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1656 transitions. [2021-12-21 14:52:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:33,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:33,324 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] [2021-12-21 14:52:33,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:52:33,325 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2125993649, now seen corresponding path program 1 times [2021-12-21 14:52:33,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764991725] [2021-12-21 14:52:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:33,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:33,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:33,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764991725] [2021-12-21 14:52:33,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764991725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:33,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:33,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:52:33,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835918819] [2021-12-21 14:52:33,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:33,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:52:33,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:52:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:52:33,438 INFO L87 Difference]: Start difference. First operand 1187 states and 1656 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) [2021-12-21 14:52:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:34,308 INFO L93 Difference]: Finished difference Result 2068 states and 2799 transitions. [2021-12-21 14:52:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:52:34,308 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 [2021-12-21 14:52:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:34,313 INFO L225 Difference]: With dead ends: 2068 [2021-12-21 14:52:34,313 INFO L226 Difference]: Without dead ends: 1299 [2021-12-21 14:52:34,315 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 [2021-12-21 14:52:34,316 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1032 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:34,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 3228 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-12-21 14:52:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1207. [2021-12-21 14:52:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1005 states have (on average 1.4238805970149253) internal successors, (1431), 1020 states have internal predecessors, (1431), 111 states have call successors, (111), 75 states have call predecessors, (111), 89 states have return successors, (129), 113 states have call predecessors, (129), 107 states have call successors, (129) [2021-12-21 14:52:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1671 transitions. [2021-12-21 14:52:34,355 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1671 transitions. Word has length 65 [2021-12-21 14:52:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:34,355 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 1671 transitions. [2021-12-21 14:52:34,355 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) [2021-12-21 14:52:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1671 transitions. [2021-12-21 14:52:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:34,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:34,356 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] [2021-12-21 14:52:34,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:52:34,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:34,357 INFO L85 PathProgramCache]: Analyzing trace with hash -739790255, now seen corresponding path program 1 times [2021-12-21 14:52:34,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:34,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745740260] [2021-12-21 14:52:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:34,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:34,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:34,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745740260] [2021-12-21 14:52:34,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745740260] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:34,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:34,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:52:34,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627762335] [2021-12-21 14:52:34,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:34,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:52:34,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:52:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:52:34,459 INFO L87 Difference]: Start difference. First operand 1207 states and 1671 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) [2021-12-21 14:52:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:35,348 INFO L93 Difference]: Finished difference Result 2775 states and 3618 transitions. [2021-12-21 14:52:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 14:52:35,348 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 [2021-12-21 14:52:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:35,355 INFO L225 Difference]: With dead ends: 2775 [2021-12-21 14:52:35,356 INFO L226 Difference]: Without dead ends: 1987 [2021-12-21 14:52:35,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-21 14:52:35,360 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1899 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1929 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:35,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1929 Valid, 2300 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:35,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-12-21 14:52:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1655. [2021-12-21 14:52:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1358 states have (on average 1.3843888070692194) internal successors, (1880), 1382 states have internal predecessors, (1880), 157 states have call successors, (157), 114 states have call predecessors, (157), 138 states have return successors, (201), 161 states have call predecessors, (201), 153 states have call successors, (201) [2021-12-21 14:52:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2238 transitions. [2021-12-21 14:52:35,423 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2238 transitions. Word has length 65 [2021-12-21 14:52:35,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:35,423 INFO L470 AbstractCegarLoop]: Abstraction has 1655 states and 2238 transitions. [2021-12-21 14:52:35,423 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) [2021-12-21 14:52:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2238 transitions. [2021-12-21 14:52:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:35,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:35,425 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] [2021-12-21 14:52:35,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:52:35,425 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:35,426 INFO L85 PathProgramCache]: Analyzing trace with hash -873803761, now seen corresponding path program 1 times [2021-12-21 14:52:35,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:35,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824937224] [2021-12-21 14:52:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:35,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:35,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:35,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824937224] [2021-12-21 14:52:35,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824937224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:35,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:35,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:35,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468949880] [2021-12-21 14:52:35,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:35,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:35,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:35,518 INFO L87 Difference]: Start difference. First operand 1655 states and 2238 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) [2021-12-21 14:52:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:35,925 INFO L93 Difference]: Finished difference Result 4133 states and 5392 transitions. [2021-12-21 14:52:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:52:35,925 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 [2021-12-21 14:52:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:35,937 INFO L225 Difference]: With dead ends: 4133 [2021-12-21 14:52:35,937 INFO L226 Difference]: Without dead ends: 2899 [2021-12-21 14:52:35,940 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 [2021-12-21 14:52:35,942 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1872 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:35,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 1860 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:52:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-12-21 14:52:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2791. [2021-12-21 14:52:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2229 states have (on average 1.316733961417676) internal successors, (2935), 2275 states have internal predecessors, (2935), 286 states have call successors, (286), 220 states have call predecessors, (286), 274 states have return successors, (415), 300 states have call predecessors, (415), 282 states have call successors, (415) [2021-12-21 14:52:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3636 transitions. [2021-12-21 14:52:36,044 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3636 transitions. Word has length 65 [2021-12-21 14:52:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:36,044 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 3636 transitions. [2021-12-21 14:52:36,044 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) [2021-12-21 14:52:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3636 transitions. [2021-12-21 14:52:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:52:36,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:36,046 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] [2021-12-21 14:52:36,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:52:36,046 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:36,047 INFO L85 PathProgramCache]: Analyzing trace with hash -635681848, now seen corresponding path program 1 times [2021-12-21 14:52:36,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:36,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904500376] [2021-12-21 14:52:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:36,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:36,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:36,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904500376] [2021-12-21 14:52:36,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904500376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:36,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:36,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:36,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941115890] [2021-12-21 14:52:36,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:36,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:36,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:36,127 INFO L87 Difference]: Start difference. First operand 2791 states and 3636 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) [2021-12-21 14:52:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:36,752 INFO L93 Difference]: Finished difference Result 6243 states and 7968 transitions. [2021-12-21 14:52:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:52:36,753 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 [2021-12-21 14:52:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:36,768 INFO L225 Difference]: With dead ends: 6243 [2021-12-21 14:52:36,768 INFO L226 Difference]: Without dead ends: 3880 [2021-12-21 14:52:36,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:36,773 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 868 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:36,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 2240 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:52:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-12-21 14:52:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 3624. [2021-12-21 14:52:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 2874 states have (on average 1.2964509394572026) internal successors, (3726), 2927 states have internal predecessors, (3726), 378 states have call successors, (378), 300 states have call predecessors, (378), 370 states have return successors, (533), 401 states have call predecessors, (533), 374 states have call successors, (533) [2021-12-21 14:52:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 4637 transitions. [2021-12-21 14:52:36,908 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 4637 transitions. Word has length 66 [2021-12-21 14:52:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:36,909 INFO L470 AbstractCegarLoop]: Abstraction has 3624 states and 4637 transitions. [2021-12-21 14:52:36,909 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) [2021-12-21 14:52:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 4637 transitions. [2021-12-21 14:52:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 14:52:36,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:36,913 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] [2021-12-21 14:52:36,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:52:36,913 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:36,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2082238937, now seen corresponding path program 1 times [2021-12-21 14:52:36,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:36,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860436119] [2021-12-21 14:52:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:36,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:36,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:36,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860436119] [2021-12-21 14:52:36,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860436119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:36,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:36,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:36,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426922465] [2021-12-21 14:52:36,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:36,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:36,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:36,996 INFO L87 Difference]: Start difference. First operand 3624 states and 4637 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) [2021-12-21 14:52:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:37,368 INFO L93 Difference]: Finished difference Result 7635 states and 9611 transitions. [2021-12-21 14:52:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:52:37,369 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 [2021-12-21 14:52:37,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:37,384 INFO L225 Difference]: With dead ends: 7635 [2021-12-21 14:52:37,385 INFO L226 Difference]: Without dead ends: 4435 [2021-12-21 14:52:37,391 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 [2021-12-21 14:52:37,392 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1467 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:37,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1932 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:52:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-12-21 14:52:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 4187. [2021-12-21 14:52:37,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 3321 states have (on average 1.2866606443842217) internal successors, (4273), 3380 states have internal predecessors, (4273), 434 states have call successors, (434), 350 states have call predecessors, (434), 430 states have return successors, (610), 461 states have call predecessors, (610), 430 states have call successors, (610) [2021-12-21 14:52:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 5317 transitions. [2021-12-21 14:52:37,549 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 5317 transitions. Word has length 72 [2021-12-21 14:52:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:37,550 INFO L470 AbstractCegarLoop]: Abstraction has 4187 states and 5317 transitions. [2021-12-21 14:52:37,550 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) [2021-12-21 14:52:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 5317 transitions. [2021-12-21 14:52:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 14:52:37,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:37,553 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] [2021-12-21 14:52:37,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:52:37,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:37,554 INFO L85 PathProgramCache]: Analyzing trace with hash -641928531, now seen corresponding path program 1 times [2021-12-21 14:52:37,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:37,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570386091] [2021-12-21 14:52:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:37,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:37,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570386091] [2021-12-21 14:52:37,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570386091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:37,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:37,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:37,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307247043] [2021-12-21 14:52:37,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:37,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:37,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:37,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:37,640 INFO L87 Difference]: Start difference. First operand 4187 states and 5317 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) [2021-12-21 14:52:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:38,126 INFO L93 Difference]: Finished difference Result 5256 states and 6601 transitions. [2021-12-21 14:52:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:52:38,127 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 [2021-12-21 14:52:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:38,142 INFO L225 Difference]: With dead ends: 5256 [2021-12-21 14:52:38,142 INFO L226 Difference]: Without dead ends: 5253 [2021-12-21 14:52:38,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:52:38,146 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 2206 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2216 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:38,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2216 Valid, 1900 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:52:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2021-12-21 14:52:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4944. [2021-12-21 14:52:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 3899 states have (on average 1.2744293408566298) internal successors, (4969), 3965 states have internal predecessors, (4969), 517 states have call successors, (517), 422 states have call predecessors, (517), 526 states have return successors, (738), 561 states have call predecessors, (738), 514 states have call successors, (738) [2021-12-21 14:52:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 6224 transitions. [2021-12-21 14:52:38,342 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 6224 transitions. Word has length 73 [2021-12-21 14:52:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:38,343 INFO L470 AbstractCegarLoop]: Abstraction has 4944 states and 6224 transitions. [2021-12-21 14:52:38,344 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) [2021-12-21 14:52:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 6224 transitions. [2021-12-21 14:52:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 14:52:38,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:38,346 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] [2021-12-21 14:52:38,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:52:38,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1573517105, now seen corresponding path program 1 times [2021-12-21 14:52:38,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:38,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739357232] [2021-12-21 14:52:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:38,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:38,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:38,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739357232] [2021-12-21 14:52:38,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739357232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:52:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615957151] [2021-12-21 14:52:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:38,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:52:38,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:52:38,443 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) [2021-12-21 14:52:38,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:52:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:52:38,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:52:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:38,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:52:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:39,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615957151] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:52:39,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:52:39,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-21 14:52:39,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135210994] [2021-12-21 14:52:39,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:52:39,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:52:39,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:39,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:52:39,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:52:39,140 INFO L87 Difference]: Start difference. First operand 4944 states and 6224 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) [2021-12-21 14:52:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:40,610 INFO L93 Difference]: Finished difference Result 9458 states and 11709 transitions. [2021-12-21 14:52:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 14:52:40,610 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 [2021-12-21 14:52:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:40,641 INFO L225 Difference]: With dead ends: 9458 [2021-12-21 14:52:40,641 INFO L226 Difference]: Without dead ends: 9455 [2021-12-21 14:52:40,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-21 14:52:40,646 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 3011 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:40,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 3027 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:52:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-12-21 14:52:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 8569. [2021-12-21 14:52:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8569 states, 6734 states have (on average 1.2567567567567568) internal successors, (8463), 6851 states have internal predecessors, (8463), 895 states have call successors, (895), 754 states have call predecessors, (895), 938 states have return successors, (1295), 968 states have call predecessors, (1295), 892 states have call successors, (1295) [2021-12-21 14:52:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8569 states to 8569 states and 10653 transitions. [2021-12-21 14:52:40,967 INFO L78 Accepts]: Start accepts. Automaton has 8569 states and 10653 transitions. Word has length 74 [2021-12-21 14:52:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:40,968 INFO L470 AbstractCegarLoop]: Abstraction has 8569 states and 10653 transitions. [2021-12-21 14:52:40,968 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) [2021-12-21 14:52:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 8569 states and 10653 transitions. [2021-12-21 14:52:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 14:52:40,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:40,970 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] [2021-12-21 14:52:40,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:52:41,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 14:52:41,184 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash -347460051, now seen corresponding path program 2 times [2021-12-21 14:52:41,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:41,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405655837] [2021-12-21 14:52:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:41,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:41,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405655837] [2021-12-21 14:52:41,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405655837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:41,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:41,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:41,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128436503] [2021-12-21 14:52:41,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:41,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:41,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:41,231 INFO L87 Difference]: Start difference. First operand 8569 states and 10653 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) [2021-12-21 14:52:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:41,641 INFO L93 Difference]: Finished difference Result 11599 states and 14400 transitions. [2021-12-21 14:52:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:52:41,642 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 [2021-12-21 14:52:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:41,667 INFO L225 Difference]: With dead ends: 11599 [2021-12-21 14:52:41,667 INFO L226 Difference]: Without dead ends: 4801 [2021-12-21 14:52:41,675 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 [2021-12-21 14:52:41,675 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 1738 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:41,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1775 Valid, 1624 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:52:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2021-12-21 14:52:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 3732. [2021-12-21 14:52:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 2965 states have (on average 1.267116357504216) internal successors, (3757), 3004 states have internal predecessors, (3757), 394 states have call successors, (394), 318 states have call predecessors, (394), 371 states have return successors, (519), 414 states have call predecessors, (519), 391 states have call successors, (519) [2021-12-21 14:52:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 4670 transitions. [2021-12-21 14:52:41,803 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 4670 transitions. Word has length 77 [2021-12-21 14:52:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:41,804 INFO L470 AbstractCegarLoop]: Abstraction has 3732 states and 4670 transitions. [2021-12-21 14:52:41,804 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) [2021-12-21 14:52:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 4670 transitions. [2021-12-21 14:52:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 14:52:41,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:41,806 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] [2021-12-21 14:52:41,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:52:41,806 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2092587107, now seen corresponding path program 1 times [2021-12-21 14:52:41,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:41,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349308878] [2021-12-21 14:52:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:41,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 14:52:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:52:41,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:41,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349308878] [2021-12-21 14:52:41,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349308878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:41,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:41,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:52:41,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177346092] [2021-12-21 14:52:41,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:41,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:52:41,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:52:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:52:41,875 INFO L87 Difference]: Start difference. First operand 3732 states and 4670 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) [2021-12-21 14:52:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:43,025 INFO L93 Difference]: Finished difference Result 10340 states and 12693 transitions. [2021-12-21 14:52:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 14:52:43,025 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 [2021-12-21 14:52:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:43,043 INFO L225 Difference]: With dead ends: 10340 [2021-12-21 14:52:43,043 INFO L226 Difference]: Without dead ends: 5964 [2021-12-21 14:52:43,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-21 14:52:43,053 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1149 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:43,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 2735 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:52:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5964 states. [2021-12-21 14:52:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5964 to 5700. [2021-12-21 14:52:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 4460 states have (on average 1.229596412556054) internal successors, (5484), 4542 states have internal predecessors, (5484), 610 states have call successors, (610), 504 states have call predecessors, (610), 628 states have return successors, (903), 658 states have call predecessors, (903), 607 states have call successors, (903) [2021-12-21 14:52:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 6997 transitions. [2021-12-21 14:52:43,262 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 6997 transitions. Word has length 84 [2021-12-21 14:52:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:43,262 INFO L470 AbstractCegarLoop]: Abstraction has 5700 states and 6997 transitions. [2021-12-21 14:52:43,263 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) [2021-12-21 14:52:43,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 6997 transitions. [2021-12-21 14:52:43,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:52:43,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:43,265 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] [2021-12-21 14:52:43,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:52:43,265 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:43,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1656161323, now seen corresponding path program 1 times [2021-12-21 14:52:43,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:43,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943295261] [2021-12-21 14:52:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:43,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:43,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:43,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:43,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:43,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:43,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:43,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:43,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:43,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:52:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 14:52:43,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943295261] [2021-12-21 14:52:43,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943295261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:43,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:43,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:52:43,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821769702] [2021-12-21 14:52:43,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:43,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:52:43,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:52:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:52:43,340 INFO L87 Difference]: Start difference. First operand 5700 states and 6997 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) [2021-12-21 14:52:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:44,515 INFO L93 Difference]: Finished difference Result 9347 states and 11355 transitions. [2021-12-21 14:52:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 14:52:44,516 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 [2021-12-21 14:52:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:44,527 INFO L225 Difference]: With dead ends: 9347 [2021-12-21 14:52:44,527 INFO L226 Difference]: Without dead ends: 4798 [2021-12-21 14:52:44,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-21 14:52:44,534 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 2044 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:44,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2084 Valid, 3111 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:52:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-12-21 14:52:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4367. [2021-12-21 14:52:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4367 states, 3413 states have (on average 1.2194550249047758) internal successors, (4162), 3478 states have internal predecessors, (4162), 467 states have call successors, (467), 379 states have call predecessors, (467), 485 states have return successors, (645), 514 states have call predecessors, (645), 464 states have call successors, (645) [2021-12-21 14:52:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4367 states to 4367 states and 5274 transitions. [2021-12-21 14:52:44,683 INFO L78 Accepts]: Start accepts. Automaton has 4367 states and 5274 transitions. Word has length 93 [2021-12-21 14:52:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:44,683 INFO L470 AbstractCegarLoop]: Abstraction has 4367 states and 5274 transitions. [2021-12-21 14:52:44,683 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) [2021-12-21 14:52:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4367 states and 5274 transitions. [2021-12-21 14:52:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:44,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:44,687 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] [2021-12-21 14:52:44,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:52:44,687 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash 887849757, now seen corresponding path program 1 times [2021-12-21 14:52:44,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:44,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147973546] [2021-12-21 14:52:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:44,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 14:52:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:52:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:52:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 14:52:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 14:52:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-21 14:52:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 14:52:44,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:44,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147973546] [2021-12-21 14:52:44,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147973546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:52:44,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179438149] [2021-12-21 14:52:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:44,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:52:44,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:52:44,800 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) [2021-12-21 14:52:44,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:52:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 14:52:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:52:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 14:52:45,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:52:45,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179438149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:45,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:52:45,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-21 14:52:45,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238727863] [2021-12-21 14:52:45,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:45,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:45,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:45,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:52:45,131 INFO L87 Difference]: Start difference. First operand 4367 states and 5274 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) [2021-12-21 14:52:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:45,264 INFO L93 Difference]: Finished difference Result 6587 states and 7913 transitions. [2021-12-21 14:52:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:45,265 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 [2021-12-21 14:52:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:45,271 INFO L225 Difference]: With dead ends: 6587 [2021-12-21 14:52:45,271 INFO L226 Difference]: Without dead ends: 2648 [2021-12-21 14:52:45,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-21 14:52:45,277 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 34 mSDsluCounter, 3071 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3848 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 [2021-12-21 14:52:45,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3848 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:52:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-12-21 14:52:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2492. [2021-12-21 14:52:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2038 states have (on average 1.2433758586849852) internal successors, (2534), 2057 states have internal predecessors, (2534), 229 states have call successors, (229), 173 states have call predecessors, (229), 223 states have return successors, (309), 262 states have call predecessors, (309), 226 states have call successors, (309) [2021-12-21 14:52:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3072 transitions. [2021-12-21 14:52:45,361 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3072 transitions. Word has length 145 [2021-12-21 14:52:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:45,361 INFO L470 AbstractCegarLoop]: Abstraction has 2492 states and 3072 transitions. [2021-12-21 14:52:45,361 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) [2021-12-21 14:52:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3072 transitions. [2021-12-21 14:52:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-21 14:52:45,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:45,364 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] [2021-12-21 14:52:45,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:52:45,579 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,SelfDestructingSolverStorable13 [2021-12-21 14:52:45,579 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1402885593, now seen corresponding path program 1 times [2021-12-21 14:52:45,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:45,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603681240] [2021-12-21 14:52:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:45,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 14:52:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 14:52:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 14:52:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 14:52:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-21 14:52:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-21 14:52:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 14:52:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-21 14:52:45,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:45,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603681240] [2021-12-21 14:52:45,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603681240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:45,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:45,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:45,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224221211] [2021-12-21 14:52:45,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:45,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:45,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:45,658 INFO L87 Difference]: Start difference. First operand 2492 states and 3072 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) [2021-12-21 14:52:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:46,199 INFO L93 Difference]: Finished difference Result 2546 states and 3128 transitions. [2021-12-21 14:52:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:46,200 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 [2021-12-21 14:52:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:46,204 INFO L225 Difference]: With dead ends: 2546 [2021-12-21 14:52:46,204 INFO L226 Difference]: Without dead ends: 2028 [2021-12-21 14:52:46,205 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 [2021-12-21 14:52:46,205 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 793 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:46,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 2160 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:52:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-12-21 14:52:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1977. [2021-12-21 14:52:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1641 states have (on average 1.2693479585618526) internal successors, (2083), 1656 states have internal predecessors, (2083), 172 states have call successors, (172), 124 states have call predecessors, (172), 162 states have return successors, (231), 197 states have call predecessors, (231), 169 states have call successors, (231) [2021-12-21 14:52:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2486 transitions. [2021-12-21 14:52:46,306 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2486 transitions. Word has length 147 [2021-12-21 14:52:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:46,306 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 2486 transitions. [2021-12-21 14:52:46,306 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) [2021-12-21 14:52:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2486 transitions. [2021-12-21 14:52:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-21 14:52:46,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:46,309 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] [2021-12-21 14:52:46,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:52:46,310 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1576195005, now seen corresponding path program 1 times [2021-12-21 14:52:46,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:46,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968729496] [2021-12-21 14:52:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:46,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 14:52:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 14:52:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 14:52:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 14:52:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-21 14:52:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-21 14:52:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 14:52:46,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968729496] [2021-12-21 14:52:46,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968729496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:46,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:46,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:46,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665134816] [2021-12-21 14:52:46,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:46,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:46,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:46,386 INFO L87 Difference]: Start difference. First operand 1977 states and 2486 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) [2021-12-21 14:52:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:46,996 INFO L93 Difference]: Finished difference Result 3260 states and 4006 transitions. [2021-12-21 14:52:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:52:46,996 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 [2021-12-21 14:52:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:47,000 INFO L225 Difference]: With dead ends: 3260 [2021-12-21 14:52:47,000 INFO L226 Difference]: Without dead ends: 1870 [2021-12-21 14:52:47,001 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 [2021-12-21 14:52:47,003 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1058 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:47,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 2334 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:52:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-12-21 14:52:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1724. [2021-12-21 14:52:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1439 states have (on average 1.2876997915218902) internal successors, (1853), 1454 states have internal predecessors, (1853), 147 states have call successors, (147), 103 states have call predecessors, (147), 136 states have return successors, (193), 167 states have call predecessors, (193), 144 states have call successors, (193) [2021-12-21 14:52:47,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2193 transitions. [2021-12-21 14:52:47,062 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2193 transitions. Word has length 159 [2021-12-21 14:52:47,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:47,063 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 2193 transitions. [2021-12-21 14:52:47,063 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) [2021-12-21 14:52:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2193 transitions. [2021-12-21 14:52:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 14:52:47,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:47,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:47,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:52:47,068 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1931976376, now seen corresponding path program 1 times [2021-12-21 14:52:47,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:47,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214884833] [2021-12-21 14:52:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:47,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 14:52:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 14:52:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-21 14:52:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 14:52:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-21 14:52:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-21 14:52:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:52:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 14:52:47,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:47,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214884833] [2021-12-21 14:52:47,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214884833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:52:47,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528259210] [2021-12-21 14:52:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:47,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:52:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:52:47,186 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) [2021-12-21 14:52:47,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:52:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 14:52:47,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:52:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-21 14:52:47,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:52:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528259210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:47,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:52:47,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-21 14:52:47,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204128043] [2021-12-21 14:52:47,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:47,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:52:47,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:52:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:47,575 INFO L87 Difference]: Start difference. First operand 1724 states and 2193 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 14:52:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:48,007 INFO L93 Difference]: Finished difference Result 4050 states and 5001 transitions. [2021-12-21 14:52:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:52:48,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 162 [2021-12-21 14:52:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:48,012 INFO L225 Difference]: With dead ends: 4050 [2021-12-21 14:52:48,012 INFO L226 Difference]: Without dead ends: 2640 [2021-12-21 14:52:48,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:52:48,015 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 398 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:48,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 1518 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:52:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-12-21 14:52:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2598. [2021-12-21 14:52:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.23963133640553) internal successors, (2690), 2189 states have internal predecessors, (2690), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-21 14:52:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3211 transitions. [2021-12-21 14:52:48,104 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3211 transitions. Word has length 162 [2021-12-21 14:52:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:48,104 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3211 transitions. [2021-12-21 14:52:48,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 14:52:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3211 transitions. [2021-12-21 14:52:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:52:48,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:48,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:48,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:52:48,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:52:48,322 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:48,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1228190577, now seen corresponding path program 1 times [2021-12-21 14:52:48,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:48,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108632959] [2021-12-21 14:52:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:48,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:48,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:48,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:52:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:48,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:52:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:48,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:52:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:48,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:52:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:48,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:48,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108632959] [2021-12-21 14:52:48,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108632959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:48,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:48,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:52:48,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810757794] [2021-12-21 14:52:48,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:48,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:52:48,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:52:48,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:52:48,430 INFO L87 Difference]: Start difference. First operand 2598 states and 3211 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:49,809 INFO L93 Difference]: Finished difference Result 3154 states and 4115 transitions. [2021-12-21 14:52:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:52:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:49,815 INFO L225 Difference]: With dead ends: 3154 [2021-12-21 14:52:49,815 INFO L226 Difference]: Without dead ends: 2751 [2021-12-21 14:52:49,816 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 [2021-12-21 14:52:49,816 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 1221 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:49,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 1473 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:52:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-12-21 14:52:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2598. [2021-12-21 14:52:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.2391705069124423) internal successors, (2689), 2189 states have internal predecessors, (2689), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-21 14:52:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3210 transitions. [2021-12-21 14:52:49,953 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3210 transitions. Word has length 190 [2021-12-21 14:52:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:49,953 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3210 transitions. [2021-12-21 14:52:49,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3210 transitions. [2021-12-21 14:52:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:52:49,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:49,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:49,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:52:49,956 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:49,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1718643149, now seen corresponding path program 1 times [2021-12-21 14:52:49,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:49,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093890672] [2021-12-21 14:52:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:49,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:49,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:50,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:52:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:50,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:52:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:50,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:52:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:50,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:52:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:50,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:50,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093890672] [2021-12-21 14:52:50,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093890672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:50,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:50,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:52:50,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747054327] [2021-12-21 14:52:50,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:50,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:52:50,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:50,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:52:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:52:50,055 INFO L87 Difference]: Start difference. First operand 2598 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:51,549 INFO L93 Difference]: Finished difference Result 3146 states and 4098 transitions. [2021-12-21 14:52:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:51,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:52:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:51,556 INFO L225 Difference]: With dead ends: 3146 [2021-12-21 14:52:51,556 INFO L226 Difference]: Without dead ends: 2751 [2021-12-21 14:52:51,558 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 [2021-12-21 14:52:51,558 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 1212 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:51,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 1471 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:52:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-12-21 14:52:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2598. [2021-12-21 14:52:51,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.238709677419355) internal successors, (2688), 2189 states have internal predecessors, (2688), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-21 14:52:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3209 transitions. [2021-12-21 14:52:51,700 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3209 transitions. Word has length 190 [2021-12-21 14:52:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:51,700 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3209 transitions. [2021-12-21 14:52:51,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3209 transitions. [2021-12-21 14:52:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:52:51,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:51,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:51,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:52:51,703 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -887989515, now seen corresponding path program 1 times [2021-12-21 14:52:51,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:51,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506199848] [2021-12-21 14:52:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:51,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:51,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:51,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:52:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:51,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:52:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:52:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:51,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:52:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:51,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:51,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506199848] [2021-12-21 14:52:51,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506199848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:51,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:51,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:51,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760090321] [2021-12-21 14:52:51,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:51,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:51,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:51,829 INFO L87 Difference]: Start difference. First operand 2598 states and 3209 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:54,396 INFO L93 Difference]: Finished difference Result 3700 states and 5000 transitions. [2021-12-21 14:52:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:52:54,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:52:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:54,403 INFO L225 Difference]: With dead ends: 3700 [2021-12-21 14:52:54,403 INFO L226 Difference]: Without dead ends: 3312 [2021-12-21 14:52:54,404 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 [2021-12-21 14:52:54,404 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 1901 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:54,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1931 Valid, 2147 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 14:52:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3312 states. [2021-12-21 14:52:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3312 to 3005. [2021-12-21 14:52:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 2548 states have (on average 1.293171114599686) internal successors, (3295), 2568 states have internal predecessors, (3295), 239 states have call successors, (239), 160 states have call predecessors, (239), 216 states have return successors, (329), 277 states have call predecessors, (329), 236 states have call successors, (329) [2021-12-21 14:52:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 3863 transitions. [2021-12-21 14:52:54,570 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 3863 transitions. Word has length 190 [2021-12-21 14:52:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:54,571 INFO L470 AbstractCegarLoop]: Abstraction has 3005 states and 3863 transitions. [2021-12-21 14:52:54,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 3863 transitions. [2021-12-21 14:52:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:52:54,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:54,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:54,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:52:54,574 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:54,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1559951345, now seen corresponding path program 1 times [2021-12-21 14:52:54,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:54,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9190918] [2021-12-21 14:52:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:54,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:54,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:54,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:52:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:54,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:52:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:54,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:52:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:54,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:52:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:54,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9190918] [2021-12-21 14:52:54,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9190918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:54,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:54,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:54,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702703730] [2021-12-21 14:52:54,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:54,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:54,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:54,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:54,705 INFO L87 Difference]: Start difference. First operand 3005 states and 3863 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:57,839 INFO L93 Difference]: Finished difference Result 4688 states and 6603 transitions. [2021-12-21 14:52:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:52:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:57,846 INFO L225 Difference]: With dead ends: 4688 [2021-12-21 14:52:57,846 INFO L226 Difference]: Without dead ends: 3893 [2021-12-21 14:52:57,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:57,848 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 2045 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 3126 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 2638 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 3126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:57,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 2638 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 3126 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 14:52:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2021-12-21 14:52:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3383. [2021-12-21 14:52:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 2897 states have (on average 1.3268898860890577) internal successors, (3844), 2918 states have internal predecessors, (3844), 261 states have call successors, (261), 166 states have call predecessors, (261), 223 states have return successors, (353), 300 states have call predecessors, (353), 258 states have call successors, (353) [2021-12-21 14:52:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4458 transitions. [2021-12-21 14:52:58,031 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4458 transitions. Word has length 190 [2021-12-21 14:52:58,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:58,032 INFO L470 AbstractCegarLoop]: Abstraction has 3383 states and 4458 transitions. [2021-12-21 14:52:58,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4458 transitions. [2021-12-21 14:52:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:52:58,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:58,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:58,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:52:58,035 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash -363299085, now seen corresponding path program 1 times [2021-12-21 14:52:58,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:58,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120164358] [2021-12-21 14:52:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:58,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:58,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:58,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:52:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:58,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:52:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:58,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:52:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:58,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:52:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:58,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:58,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120164358] [2021-12-21 14:52:58,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120164358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:58,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:58,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:58,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157375073] [2021-12-21 14:52:58,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:58,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:58,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:58,174 INFO L87 Difference]: Start difference. First operand 3383 states and 4458 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:01,477 INFO L93 Difference]: Finished difference Result 6145 states and 8946 transitions. [2021-12-21 14:53:01,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:01,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:53:01,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:01,490 INFO L225 Difference]: With dead ends: 6145 [2021-12-21 14:53:01,491 INFO L226 Difference]: Without dead ends: 4972 [2021-12-21 14:53:01,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:01,498 INFO L933 BasicCegarLoop]: 1210 mSDtfsCounter, 1934 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 3470 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 3564 SdHoareTripleChecker+Invalid, 3594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:01,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1964 Valid, 3564 Invalid, 3594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3470 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 14:53:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2021-12-21 14:53:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4140. [2021-12-21 14:53:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3596 states have (on average 1.3745828698553948) internal successors, (4943), 3619 states have internal predecessors, (4943), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-21 14:53:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 5653 transitions. [2021-12-21 14:53:01,769 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 5653 transitions. Word has length 190 [2021-12-21 14:53:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:01,770 INFO L470 AbstractCegarLoop]: Abstraction has 4140 states and 5653 transitions. [2021-12-21 14:53:01,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 5653 transitions. [2021-12-21 14:53:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:53:01,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:01,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:01,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 14:53:01,772 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:01,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2087907407, now seen corresponding path program 1 times [2021-12-21 14:53:01,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:01,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268172836] [2021-12-21 14:53:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:01,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:01,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:53:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:01,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:53:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:53:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:01,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:53:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:01,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:01,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268172836] [2021-12-21 14:53:01,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268172836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:01,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:01,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:01,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717754061] [2021-12-21 14:53:01,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:01,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:01,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:01,885 INFO L87 Difference]: Start difference. First operand 4140 states and 5653 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:03,779 INFO L93 Difference]: Finished difference Result 6890 states and 10132 transitions. [2021-12-21 14:53:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:53:03,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:53:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:03,789 INFO L225 Difference]: With dead ends: 6890 [2021-12-21 14:53:03,789 INFO L226 Difference]: Without dead ends: 4960 [2021-12-21 14:53:03,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:53:03,794 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 1431 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 2054 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:53:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2021-12-21 14:53:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 4140. [2021-12-21 14:53:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3596 states have (on average 1.3731924360400445) internal successors, (4938), 3619 states have internal predecessors, (4938), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-21 14:53:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 5648 transitions. [2021-12-21 14:53:04,039 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 5648 transitions. Word has length 190 [2021-12-21 14:53:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:04,039 INFO L470 AbstractCegarLoop]: Abstraction has 4140 states and 5648 transitions. [2021-12-21 14:53:04,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 5648 transitions. [2021-12-21 14:53:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:53:04,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:04,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:04,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 14:53:04,042 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1589350605, now seen corresponding path program 1 times [2021-12-21 14:53:04,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:04,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44543703] [2021-12-21 14:53:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:04,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:04,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:04,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:53:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:04,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:53:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:04,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:53:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:04,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:53:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:04,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44543703] [2021-12-21 14:53:04,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44543703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:04,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:04,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:04,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694899077] [2021-12-21 14:53:04,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:04,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:04,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:04,156 INFO L87 Difference]: Start difference. First operand 4140 states and 5648 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:06,026 INFO L93 Difference]: Finished difference Result 6884 states and 10106 transitions. [2021-12-21 14:53:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:53:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:53:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:06,037 INFO L225 Difference]: With dead ends: 6884 [2021-12-21 14:53:06,037 INFO L226 Difference]: Without dead ends: 4954 [2021-12-21 14:53:06,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:53:06,044 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 1431 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:06,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 2048 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:53:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4954 states. [2021-12-21 14:53:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4954 to 4140. [2021-12-21 14:53:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3596 states have (on average 1.3718020022246942) internal successors, (4933), 3619 states have internal predecessors, (4933), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-21 14:53:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 5643 transitions. [2021-12-21 14:53:06,345 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 5643 transitions. Word has length 190 [2021-12-21 14:53:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:06,345 INFO L470 AbstractCegarLoop]: Abstraction has 4140 states and 5643 transitions. [2021-12-21 14:53:06,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 5643 transitions. [2021-12-21 14:53:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:53:06,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:06,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:06,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 14:53:06,347 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:06,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1019078799, now seen corresponding path program 1 times [2021-12-21 14:53:06,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:06,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267109896] [2021-12-21 14:53:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:06,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:06,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:06,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:53:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:06,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:53:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:06,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:53:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:06,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:53:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:06,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267109896] [2021-12-21 14:53:06,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267109896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:06,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:06,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:06,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565547715] [2021-12-21 14:53:06,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:06,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:06,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:06,458 INFO L87 Difference]: Start difference. First operand 4140 states and 5643 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:08,333 INFO L93 Difference]: Finished difference Result 6872 states and 10068 transitions. [2021-12-21 14:53:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:53:08,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:53:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:08,343 INFO L225 Difference]: With dead ends: 6872 [2021-12-21 14:53:08,343 INFO L226 Difference]: Without dead ends: 4942 [2021-12-21 14:53:08,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:53:08,347 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 1428 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:08,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 2042 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 14:53:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-12-21 14:53:08,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4140. [2021-12-21 14:53:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3596 states have (on average 1.3704115684093436) internal successors, (4928), 3619 states have internal predecessors, (4928), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-21 14:53:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 5638 transitions. [2021-12-21 14:53:08,627 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 5638 transitions. Word has length 190 [2021-12-21 14:53:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:08,627 INFO L470 AbstractCegarLoop]: Abstraction has 4140 states and 5638 transitions. [2021-12-21 14:53:08,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 5638 transitions. [2021-12-21 14:53:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:53:08,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:08,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:08,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 14:53:08,629 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:08,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1805076689, now seen corresponding path program 1 times [2021-12-21 14:53:08,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:08,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492252603] [2021-12-21 14:53:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:08,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:08,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:08,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:53:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:08,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:53:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:08,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:53:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:08,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:53:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:08,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:08,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492252603] [2021-12-21 14:53:08,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492252603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:08,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:08,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:08,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466479680] [2021-12-21 14:53:08,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:08,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:08,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:08,743 INFO L87 Difference]: Start difference. First operand 4140 states and 5638 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:12,222 INFO L93 Difference]: Finished difference Result 8921 states and 13305 transitions. [2021-12-21 14:53:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:12,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:53:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:12,236 INFO L225 Difference]: With dead ends: 8921 [2021-12-21 14:53:12,237 INFO L226 Difference]: Without dead ends: 6991 [2021-12-21 14:53:12,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:12,242 INFO L933 BasicCegarLoop]: 1180 mSDtfsCounter, 1905 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 3400 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1935 SdHoareTripleChecker+Valid, 3534 SdHoareTripleChecker+Invalid, 3528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:12,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1935 Valid, 3534 Invalid, 3528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 3400 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 14:53:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6991 states. [2021-12-21 14:53:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6991 to 5673. [2021-12-21 14:53:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5673 states, 5013 states have (on average 1.424296828246559) internal successors, (7140), 5040 states have internal predecessors, (7140), 393 states have call successors, (393), 202 states have call predecessors, (393), 265 states have return successors, (515), 438 states have call predecessors, (515), 390 states have call successors, (515) [2021-12-21 14:53:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5673 states to 5673 states and 8048 transitions. [2021-12-21 14:53:12,674 INFO L78 Accepts]: Start accepts. Automaton has 5673 states and 8048 transitions. Word has length 190 [2021-12-21 14:53:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:12,674 INFO L470 AbstractCegarLoop]: Abstraction has 5673 states and 8048 transitions. [2021-12-21 14:53:12,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5673 states and 8048 transitions. [2021-12-21 14:53:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:53:12,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:12,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:12,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 14:53:12,677 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1137694799, now seen corresponding path program 1 times [2021-12-21 14:53:12,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:12,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479043720] [2021-12-21 14:53:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:12,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:12,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:12,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:53:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:12,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:53:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:12,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:53:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:53:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:12,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479043720] [2021-12-21 14:53:12,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479043720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:12,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:12,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:12,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496124300] [2021-12-21 14:53:12,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:12,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:12,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:12,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:12,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:12,788 INFO L87 Difference]: Start difference. First operand 5673 states and 8048 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:14,948 INFO L93 Difference]: Finished difference Result 10478 states and 15791 transitions. [2021-12-21 14:53:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:53:14,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:53:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:14,959 INFO L225 Difference]: With dead ends: 10478 [2021-12-21 14:53:14,959 INFO L226 Difference]: Without dead ends: 7015 [2021-12-21 14:53:14,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:53:14,965 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1427 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:14,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 2035 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 14:53:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7015 states. [2021-12-21 14:53:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7015 to 5673. [2021-12-21 14:53:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5673 states, 5013 states have (on average 1.4225014961101137) internal successors, (7131), 5040 states have internal predecessors, (7131), 393 states have call successors, (393), 202 states have call predecessors, (393), 265 states have return successors, (515), 438 states have call predecessors, (515), 390 states have call successors, (515) [2021-12-21 14:53:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5673 states to 5673 states and 8039 transitions. [2021-12-21 14:53:15,403 INFO L78 Accepts]: Start accepts. Automaton has 5673 states and 8039 transitions. Word has length 190 [2021-12-21 14:53:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:15,403 INFO L470 AbstractCegarLoop]: Abstraction has 5673 states and 8039 transitions. [2021-12-21 14:53:15,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5673 states and 8039 transitions. [2021-12-21 14:53:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:53:15,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:15,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:15,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 14:53:15,406 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:15,406 INFO L85 PathProgramCache]: Analyzing trace with hash 962043631, now seen corresponding path program 1 times [2021-12-21 14:53:15,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:15,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485467163] [2021-12-21 14:53:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:15,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:15,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:53:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:15,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:53:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:15,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:53:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:15,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:53:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:15,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:15,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485467163] [2021-12-21 14:53:15,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485467163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:15,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:15,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:15,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131839165] [2021-12-21 14:53:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:15,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:15,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:15,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:15,549 INFO L87 Difference]: Start difference. First operand 5673 states and 8039 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:19,253 INFO L93 Difference]: Finished difference Result 14514 states and 22145 transitions. [2021-12-21 14:53:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:19,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:53:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:19,270 INFO L225 Difference]: With dead ends: 14514 [2021-12-21 14:53:19,270 INFO L226 Difference]: Without dead ends: 11051 [2021-12-21 14:53:19,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:19,276 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 2008 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 3027 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2038 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 3199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:19,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2038 Valid, 2535 Invalid, 3199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3027 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 14:53:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11051 states. [2021-12-21 14:53:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11051 to 8747. [2021-12-21 14:53:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8747 states, 7855 states have (on average 1.4705283259070656) internal successors, (11551), 7890 states have internal predecessors, (11551), 569 states have call successors, (569), 250 states have call predecessors, (569), 321 states have return successors, (753), 622 states have call predecessors, (753), 566 states have call successors, (753) [2021-12-21 14:53:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8747 states to 8747 states and 12873 transitions. [2021-12-21 14:53:20,014 INFO L78 Accepts]: Start accepts. Automaton has 8747 states and 12873 transitions. Word has length 190 [2021-12-21 14:53:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:20,014 INFO L470 AbstractCegarLoop]: Abstraction has 8747 states and 12873 transitions. [2021-12-21 14:53:20,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 8747 states and 12873 transitions. [2021-12-21 14:53:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-21 14:53:20,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:20,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:20,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 14:53:20,019 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:20,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:20,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1306871793, now seen corresponding path program 1 times [2021-12-21 14:53:20,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:20,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190063502] [2021-12-21 14:53:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:20,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:20,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:20,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:53:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:20,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:53:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:20,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 14:53:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:20,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 14:53:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:20,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:20,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190063502] [2021-12-21 14:53:20,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190063502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:20,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:20,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:20,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089584476] [2021-12-21 14:53:20,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:20,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:20,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:20,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:20,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:20,137 INFO L87 Difference]: Start difference. First operand 8747 states and 12873 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:24,960 INFO L93 Difference]: Finished difference Result 25714 states and 39953 transitions. [2021-12-21 14:53:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-21 14:53:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted.