./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.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_1.cil-2+token_ring.10.cil-2.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 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:50:10,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:50:10,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:50:10,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:50:10,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:50:10,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:50:10,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:50:10,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:50:10,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:50:10,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:50:10,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:50:10,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:50:10,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:50:10,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:50:10,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:50:10,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:50:10,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:50:10,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:50:10,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:50:10,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:50:10,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:50:10,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:50:10,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:50:10,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:50:10,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:50:10,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:50:10,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:50:10,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:50:10,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:50:10,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:50:10,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:50:10,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:50:10,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:50:10,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:50:10,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:50:10,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:50:10,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:50:10,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:50:10,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:50:10,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:50:10,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:50:10,754 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:50:10,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:50:10,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:50:10,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:50:10,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:50:10,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:50:10,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:50:10,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:50:10,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:50:10,775 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:50:10,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:50:10,776 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:50:10,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:50:10,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:50:10,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:50:10,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:50:10,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:50:10,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:50:10,777 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:50:10,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:50:10,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:50:10,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:50:10,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:50:10,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:50:10,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:50:10,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:50:10,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:50:10,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:50:10,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:50:10,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:50:10,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:50:10,780 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:50:10,780 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:50:10,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:50:10,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:50:10,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 [2021-12-21 14:50:10,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:50:10,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:50:10,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:50:10,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:50:10,956 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:50:10,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2021-12-21 14:50:11,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a8d96db2/e5dfe13864d4403aad31511d61025f6f/FLAG63254ebe8 [2021-12-21 14:50:11,420 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:50:11,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2021-12-21 14:50:11,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a8d96db2/e5dfe13864d4403aad31511d61025f6f/FLAG63254ebe8 [2021-12-21 14:50:11,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a8d96db2/e5dfe13864d4403aad31511d61025f6f [2021-12-21 14:50:11,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:50:11,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:50:11,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:50:11,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:50:11,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:50:11,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:50:11" (1/1) ... [2021-12-21 14:50:11,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396bf3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:11, skipping insertion in model container [2021-12-21 14:50:11,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:50:11" (1/1) ... [2021-12-21 14:50:11,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:50:11,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:50:11,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2021-12-21 14:50:12,008 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2021-12-21 14:50:12,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:50:12,124 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:50:12,132 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2021-12-21 14:50:12,152 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2021-12-21 14:50:12,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:50:12,208 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:50:12,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12 WrapperNode [2021-12-21 14:50:12,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:50:12,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:50:12,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:50:12,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:50:12,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,272 INFO L137 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 939 [2021-12-21 14:50:12,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:50:12,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:50:12,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:50:12,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:50:12,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:50:12,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:50:12,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:50:12,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:50:12,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (1/1) ... [2021-12-21 14:50:12,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:50:12,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:12,413 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 14:50:12,425 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 14:50:12,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:50:12,453 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:50:12,453 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:50:12,453 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-21 14:50:12,453 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-21 14:50:12,454 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:50:12,454 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:50:12,454 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:50:12,454 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:50:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:50:12,455 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:50:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:50:12,455 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:50:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:50:12,455 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:50:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:50:12,455 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:50:12,456 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:50:12,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:50:12,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:50:12,456 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:50:12,456 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:50:12,536 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:50:12,537 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:50:13,158 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:50:13,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:50:13,171 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-12-21 14:50:13,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:50:13 BoogieIcfgContainer [2021-12-21 14:50:13,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:50:13,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:50:13,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:50:13,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:50:13,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:50:11" (1/3) ... [2021-12-21 14:50:13,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d877a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:50:13, skipping insertion in model container [2021-12-21 14:50:13,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:12" (2/3) ... [2021-12-21 14:50:13,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d877a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:50:13, skipping insertion in model container [2021-12-21 14:50:13,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:50:13" (3/3) ... [2021-12-21 14:50:13,180 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2021-12-21 14:50:13,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:50:13,185 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:50:13,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:50:13,222 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 14:50:13,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:50:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 362 states have (on average 1.6408839779005524) internal successors, (594), 367 states have internal predecessors, (594), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-21 14:50:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 14:50:13,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:13,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:13,250 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash -664078165, now seen corresponding path program 1 times [2021-12-21 14:50:13,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:13,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201449150] [2021-12-21 14:50:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:13,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 14:50:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,470 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 14:50:13,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:13,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201449150] [2021-12-21 14:50:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201449150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:13,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:13,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:13,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034831427] [2021-12-21 14:50:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:13,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:13,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:13,500 INFO L87 Difference]: Start difference. First operand has 404 states, 362 states have (on average 1.6408839779005524) internal successors, (594), 367 states have internal predecessors, (594), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 14:50:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:13,927 INFO L93 Difference]: Finished difference Result 794 states and 1281 transitions. [2021-12-21 14:50:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-21 14:50:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:13,938 INFO L225 Difference]: With dead ends: 794 [2021-12-21 14:50:13,938 INFO L226 Difference]: Without dead ends: 403 [2021-12-21 14:50:13,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:13,944 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 347 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:13,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1207 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:50:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-21 14:50:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 394. [2021-12-21 14:50:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 354 states have (on average 1.5451977401129944) internal successors, (547), 357 states have internal predecessors, (547), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-21 14:50:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 605 transitions. [2021-12-21 14:50:14,005 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 605 transitions. Word has length 44 [2021-12-21 14:50:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 605 transitions. [2021-12-21 14:50:14,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 14:50:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 605 transitions. [2021-12-21 14:50:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 14:50:14,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:14,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:14,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:50:14,008 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash 707729133, now seen corresponding path program 1 times [2021-12-21 14:50:14,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:14,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953566452] [2021-12-21 14:50:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:14,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:14,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:14,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 14:50:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:14,092 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 14:50:14,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:14,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953566452] [2021-12-21 14:50:14,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953566452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:14,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:14,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:14,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50961385] [2021-12-21 14:50:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:14,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:14,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:14,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:14,095 INFO L87 Difference]: Start difference. First operand 394 states and 605 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:14,261 INFO L93 Difference]: Finished difference Result 524 states and 788 transitions. [2021-12-21 14:50:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:14,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-21 14:50:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:14,264 INFO L225 Difference]: With dead ends: 524 [2021-12-21 14:50:14,265 INFO L226 Difference]: Without dead ends: 462 [2021-12-21 14:50:14,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:14,266 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 816 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:14,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 978 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-21 14:50:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 456. [2021-12-21 14:50:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 409 states have (on average 1.5183374083129584) internal successors, (621), 413 states have internal predecessors, (621), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-12-21 14:50:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 693 transitions. [2021-12-21 14:50:14,300 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 693 transitions. Word has length 44 [2021-12-21 14:50:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:14,300 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 693 transitions. [2021-12-21 14:50:14,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 693 transitions. [2021-12-21 14:50:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:50:14,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:14,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:14,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:50:14,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:14,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1229769440, now seen corresponding path program 1 times [2021-12-21 14:50:14,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:14,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802243947] [2021-12-21 14:50:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:14,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:14,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:14,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:50:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:14,397 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 14:50:14,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:14,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802243947] [2021-12-21 14:50:14,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802243947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:14,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:14,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:14,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717103176] [2021-12-21 14:50:14,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:14,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:14,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:14,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:14,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:14,399 INFO L87 Difference]: Start difference. First operand 456 states and 693 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:14,538 INFO L93 Difference]: Finished difference Result 716 states and 1063 transitions. [2021-12-21 14:50:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:14,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:50:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:14,543 INFO L225 Difference]: With dead ends: 716 [2021-12-21 14:50:14,543 INFO L226 Difference]: Without dead ends: 592 [2021-12-21 14:50:14,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:14,548 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 833 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:14,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 987 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-12-21 14:50:14,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 567. [2021-12-21 14:50:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 507 states have (on average 1.4792899408284024) internal successors, (750), 512 states have internal predecessors, (750), 42 states have call successors, (42), 15 states have call predecessors, (42), 16 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2021-12-21 14:50:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 844 transitions. [2021-12-21 14:50:14,574 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 844 transitions. Word has length 45 [2021-12-21 14:50:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:14,574 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 844 transitions. [2021-12-21 14:50:14,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 844 transitions. [2021-12-21 14:50:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:50:14,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:14,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:14,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:50:14,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:14,593 INFO L85 PathProgramCache]: Analyzing trace with hash 54588021, now seen corresponding path program 1 times [2021-12-21 14:50:14,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:14,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082461051] [2021-12-21 14:50:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:14,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:14,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:14,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:50:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:14,647 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 14:50:14,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082461051] [2021-12-21 14:50:14,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082461051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:14,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:14,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:14,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151259162] [2021-12-21 14:50:14,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:14,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:14,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:14,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:14,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:14,649 INFO L87 Difference]: Start difference. First operand 567 states and 844 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:14,989 INFO L93 Difference]: Finished difference Result 1016 states and 1444 transitions. [2021-12-21 14:50:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:14,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:50:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:14,993 INFO L225 Difference]: With dead ends: 1016 [2021-12-21 14:50:14,993 INFO L226 Difference]: Without dead ends: 781 [2021-12-21 14:50:14,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:14,994 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 324 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:14,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1314 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:50:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-12-21 14:50:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 665. [2021-12-21 14:50:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 596 states have (on average 1.4563758389261745) internal successors, (868), 603 states have internal predecessors, (868), 46 states have call successors, (46), 20 states have call predecessors, (46), 21 states have return successors, (54), 42 states have call predecessors, (54), 44 states have call successors, (54) [2021-12-21 14:50:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 968 transitions. [2021-12-21 14:50:15,019 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 968 transitions. Word has length 45 [2021-12-21 14:50:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:15,020 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 968 transitions. [2021-12-21 14:50:15,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 968 transitions. [2021-12-21 14:50:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 14:50:15,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:15,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:15,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:50:15,022 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:15,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:15,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1156464466, now seen corresponding path program 1 times [2021-12-21 14:50:15,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:15,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302155652] [2021-12-21 14:50:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:15,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 14:50:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:50:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,071 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 14:50:15,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:15,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302155652] [2021-12-21 14:50:15,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302155652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:15,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:15,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:15,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010066019] [2021-12-21 14:50:15,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:15,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:15,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:15,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:15,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:15,074 INFO L87 Difference]: Start difference. First operand 665 states and 968 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:15,434 INFO L93 Difference]: Finished difference Result 1204 states and 1687 transitions. [2021-12-21 14:50:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:15,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-21 14:50:15,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:15,440 INFO L225 Difference]: With dead ends: 1204 [2021-12-21 14:50:15,440 INFO L226 Difference]: Without dead ends: 871 [2021-12-21 14:50:15,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:15,442 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 312 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:15,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1341 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:50:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-21 14:50:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 833. [2021-12-21 14:50:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 743 states have (on average 1.4064602960969044) internal successors, (1045), 752 states have internal predecessors, (1045), 58 states have call successors, (58), 27 states have call predecessors, (58), 30 states have return successors, (74), 54 states have call predecessors, (74), 56 states have call successors, (74) [2021-12-21 14:50:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1177 transitions. [2021-12-21 14:50:15,469 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1177 transitions. Word has length 62 [2021-12-21 14:50:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:15,469 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1177 transitions. [2021-12-21 14:50:15,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1177 transitions. [2021-12-21 14:50:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 14:50:15,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:15,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:15,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:50:15,473 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:15,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:15,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1541851731, now seen corresponding path program 1 times [2021-12-21 14:50:15,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:15,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524513381] [2021-12-21 14:50:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:15,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:50:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 14:50:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:50:15,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:15,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524513381] [2021-12-21 14:50:15,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524513381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:15,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:15,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:15,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783932941] [2021-12-21 14:50:15,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:15,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:15,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:15,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:15,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:15,527 INFO L87 Difference]: Start difference. First operand 833 states and 1177 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:50:15,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:15,684 INFO L93 Difference]: Finished difference Result 1462 states and 1999 transitions. [2021-12-21 14:50:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-21 14:50:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:15,688 INFO L225 Difference]: With dead ends: 1462 [2021-12-21 14:50:15,688 INFO L226 Difference]: Without dead ends: 1008 [2021-12-21 14:50:15,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:15,690 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 812 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:15,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1000 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-12-21 14:50:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 953. [2021-12-21 14:50:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 850 states have (on average 1.3776470588235294) internal successors, (1171), 861 states have internal predecessors, (1171), 64 states have call successors, (64), 32 states have call predecessors, (64), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-21 14:50:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1319 transitions. [2021-12-21 14:50:15,720 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1319 transitions. Word has length 67 [2021-12-21 14:50:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:15,720 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1319 transitions. [2021-12-21 14:50:15,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:50:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1319 transitions. [2021-12-21 14:50:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:50:15,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:15,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:15,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:50:15,722 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:15,722 INFO L85 PathProgramCache]: Analyzing trace with hash -14326018, now seen corresponding path program 1 times [2021-12-21 14:50:15,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:15,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490121958] [2021-12-21 14:50:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:15,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:50:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:50:15,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:15,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490121958] [2021-12-21 14:50:15,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490121958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:15,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782895707] [2021-12-21 14:50:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:15,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:15,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:15,839 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 14:50:15,854 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 14:50:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:15,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 14:50:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:16,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:50:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:16,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782895707] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:16,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 14:50:16,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-21 14:50:16,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844130686] [2021-12-21 14:50:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:16,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:16,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:16,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:16,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:50:16,274 INFO L87 Difference]: Start difference. First operand 953 states and 1319 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:16,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:16,398 INFO L93 Difference]: Finished difference Result 1009 states and 1387 transitions. [2021-12-21 14:50:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 14:50:16,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-21 14:50:16,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:16,401 INFO L225 Difference]: With dead ends: 1009 [2021-12-21 14:50:16,402 INFO L226 Difference]: Without dead ends: 1006 [2021-12-21 14:50:16,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:50:16,402 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 1096 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:16,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 700 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-12-21 14:50:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 952. [2021-12-21 14:50:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 850 states have (on average 1.3752941176470588) internal successors, (1169), 860 states have internal predecessors, (1169), 63 states have call successors, (63), 32 states have call predecessors, (63), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-21 14:50:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1316 transitions. [2021-12-21 14:50:16,429 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1316 transitions. Word has length 68 [2021-12-21 14:50:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:16,430 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1316 transitions. [2021-12-21 14:50:16,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1316 transitions. [2021-12-21 14:50:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:50:16,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:16,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:16,461 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 14:50:16,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:16,659 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:16,660 INFO L85 PathProgramCache]: Analyzing trace with hash -445352970, now seen corresponding path program 1 times [2021-12-21 14:50:16,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:16,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862157471] [2021-12-21 14:50:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:16,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:50:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:50:16,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:16,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862157471] [2021-12-21 14:50:16,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862157471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:16,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697413674] [2021-12-21 14:50:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:16,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:16,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:16,744 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 14:50:16,765 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 14:50:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:50:16,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:17,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:50:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:17,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697413674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:50:17,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:50:17,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-21 14:50:17,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944785872] [2021-12-21 14:50:17,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:50:17,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 14:50:17,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:17,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 14:50:17,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:17,252 INFO L87 Difference]: Start difference. First operand 952 states and 1316 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:50:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:18,459 INFO L93 Difference]: Finished difference Result 2652 states and 3536 transitions. [2021-12-21 14:50:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 14:50:18,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-21 14:50:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:18,468 INFO L225 Difference]: With dead ends: 2652 [2021-12-21 14:50:18,469 INFO L226 Difference]: Without dead ends: 2108 [2021-12-21 14:50:18,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 14:50:18,475 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 1620 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 3954 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:18,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1651 Valid, 3954 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:50:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-12-21 14:50:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1341. [2021-12-21 14:50:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1200 states have (on average 1.3358333333333334) internal successors, (1603), 1218 states have internal predecessors, (1603), 83 states have call successors, (83), 46 states have call predecessors, (83), 56 states have return successors, (118), 77 states have call predecessors, (118), 82 states have call successors, (118) [2021-12-21 14:50:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1804 transitions. [2021-12-21 14:50:18,540 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1804 transitions. Word has length 69 [2021-12-21 14:50:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:18,540 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 1804 transitions. [2021-12-21 14:50:18,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:50:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1804 transitions. [2021-12-21 14:50:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 14:50:18,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:18,547 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:18,579 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 14:50:18,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-21 14:50:18,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:18,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:18,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2000679978, now seen corresponding path program 1 times [2021-12-21 14:50:18,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:18,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900131392] [2021-12-21 14:50:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:18,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:50:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 14:50:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 14:50:18,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:18,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900131392] [2021-12-21 14:50:18,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900131392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:18,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046649082] [2021-12-21 14:50:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:18,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:18,863 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 14:50:18,864 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 14:50:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:50:19,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:19,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:50:19,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046649082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:19,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:50:19,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:50:19,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138467130] [2021-12-21 14:50:19,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:19,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:50:19,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:19,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:50:19,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:19,292 INFO L87 Difference]: Start difference. First operand 1341 states and 1804 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:50:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:19,350 INFO L93 Difference]: Finished difference Result 2064 states and 2742 transitions. [2021-12-21 14:50:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:50:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-21 14:50:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:19,355 INFO L225 Difference]: With dead ends: 2064 [2021-12-21 14:50:19,355 INFO L226 Difference]: Without dead ends: 1219 [2021-12-21 14:50:19,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:19,358 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 566 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:19,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 705 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:50:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-12-21 14:50:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1204. [2021-12-21 14:50:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1079 states have (on average 1.33920296570899) internal successors, (1445), 1096 states have internal predecessors, (1445), 75 states have call successors, (75), 40 states have call predecessors, (75), 48 states have return successors, (104), 68 states have call predecessors, (104), 74 states have call successors, (104) [2021-12-21 14:50:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1624 transitions. [2021-12-21 14:50:19,395 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1624 transitions. Word has length 88 [2021-12-21 14:50:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:19,395 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1624 transitions. [2021-12-21 14:50:19,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:50:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1624 transitions. [2021-12-21 14:50:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 14:50:19,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:19,398 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:19,431 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 14:50:19,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:19,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:19,617 INFO L85 PathProgramCache]: Analyzing trace with hash 148780141, now seen corresponding path program 1 times [2021-12-21 14:50:19,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:19,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129268916] [2021-12-21 14:50:19,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:19,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:19,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:19,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:19,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:19,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 14:50:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:19,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 14:50:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 14:50:19,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129268916] [2021-12-21 14:50:19,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129268916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:19,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757651617] [2021-12-21 14:50:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:19,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:19,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:19,708 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:19,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:50:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:50:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:50:19,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:50:19,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757651617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:19,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:50:19,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:50:19,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562705341] [2021-12-21 14:50:19,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:19,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:50:19,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:19,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:50:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:19,980 INFO L87 Difference]: Start difference. First operand 1204 states and 1624 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:50:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:20,010 INFO L93 Difference]: Finished difference Result 1473 states and 1965 transitions. [2021-12-21 14:50:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:50:20,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-21 14:50:20,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:20,012 INFO L225 Difference]: With dead ends: 1473 [2021-12-21 14:50:20,012 INFO L226 Difference]: Without dead ends: 328 [2021-12-21 14:50:20,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:20,014 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 59 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:20,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1228 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:50:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-21 14:50:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2021-12-21 14:50:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.569023569023569) internal successors, (466), 298 states have internal predecessors, (466), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-21 14:50:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 514 transitions. [2021-12-21 14:50:20,022 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 514 transitions. Word has length 103 [2021-12-21 14:50:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:20,022 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 514 transitions. [2021-12-21 14:50:20,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:50:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 514 transitions. [2021-12-21 14:50:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:20,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:20,024 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] [2021-12-21 14:50:20,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:20,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:20,240 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash -918151462, now seen corresponding path program 1 times [2021-12-21 14:50:20,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:20,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462424535] [2021-12-21 14:50:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:20,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,341 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 14:50:20,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:20,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462424535] [2021-12-21 14:50:20,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462424535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:20,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:20,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:50:20,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742271799] [2021-12-21 14:50:20,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:20,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:50:20,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:50:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:20,343 INFO L87 Difference]: Start difference. First operand 328 states and 514 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:21,143 INFO L93 Difference]: Finished difference Result 768 states and 1224 transitions. [2021-12-21 14:50:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:50:21,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:21,168 INFO L225 Difference]: With dead ends: 768 [2021-12-21 14:50:21,169 INFO L226 Difference]: Without dead ends: 448 [2021-12-21 14:50:21,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:50:21,171 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 879 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:21,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 923 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:50:21,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-21 14:50:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 328. [2021-12-21 14:50:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5656565656565657) internal successors, (465), 298 states have internal predecessors, (465), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-21 14:50:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 513 transitions. [2021-12-21 14:50:21,189 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 513 transitions. Word has length 156 [2021-12-21 14:50:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:21,190 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 513 transitions. [2021-12-21 14:50:21,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 513 transitions. [2021-12-21 14:50:21,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:21,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:21,192 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] [2021-12-21 14:50:21,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:50:21,193 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:21,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:21,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1445690200, now seen corresponding path program 1 times [2021-12-21 14:50:21,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:21,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200973165] [2021-12-21 14:50:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:21,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:21,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:21,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:21,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:21,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:21,300 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 14:50:21,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:21,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200973165] [2021-12-21 14:50:21,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200973165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:21,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:21,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:50:21,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531489717] [2021-12-21 14:50:21,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:21,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:50:21,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:21,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:50:21,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:21,303 INFO L87 Difference]: Start difference. First operand 328 states and 513 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:22,098 INFO L93 Difference]: Finished difference Result 760 states and 1207 transitions. [2021-12-21 14:50:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:50:22,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:22,101 INFO L225 Difference]: With dead ends: 760 [2021-12-21 14:50:22,101 INFO L226 Difference]: Without dead ends: 448 [2021-12-21 14:50:22,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:50:22,102 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 870 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:22,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 921 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:50:22,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-21 14:50:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 328. [2021-12-21 14:50:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5622895622895623) internal successors, (464), 298 states have internal predecessors, (464), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-21 14:50:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 512 transitions. [2021-12-21 14:50:22,122 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 512 transitions. Word has length 156 [2021-12-21 14:50:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:22,123 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 512 transitions. [2021-12-21 14:50:22,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 512 transitions. [2021-12-21 14:50:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:22,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:22,125 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] [2021-12-21 14:50:22,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:50:22,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:22,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:22,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1061407274, now seen corresponding path program 1 times [2021-12-21 14:50:22,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:22,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2701256] [2021-12-21 14:50:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:22,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,257 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 14:50:22,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2701256] [2021-12-21 14:50:22,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2701256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:22,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:22,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:50:22,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763023415] [2021-12-21 14:50:22,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:22,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:50:22,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:22,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:50:22,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:50:22,259 INFO L87 Difference]: Start difference. First operand 328 states and 512 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:23,992 INFO L93 Difference]: Finished difference Result 1200 states and 1919 transitions. [2021-12-21 14:50:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:50:23,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:23,996 INFO L225 Difference]: With dead ends: 1200 [2021-12-21 14:50:23,996 INFO L226 Difference]: Without dead ends: 891 [2021-12-21 14:50:23,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:23,997 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1325 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:23,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 1481 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:50:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-12-21 14:50:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 652. [2021-12-21 14:50:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 595 states have (on average 1.576470588235294) internal successors, (938), 597 states have internal predecessors, (938), 43 states have call successors, (43), 12 states have call predecessors, (43), 13 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2021-12-21 14:50:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1027 transitions. [2021-12-21 14:50:24,025 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1027 transitions. Word has length 156 [2021-12-21 14:50:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:24,026 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1027 transitions. [2021-12-21 14:50:24,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1027 transitions. [2021-12-21 14:50:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:24,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:24,027 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] [2021-12-21 14:50:24,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:50:24,027 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash 761193050, now seen corresponding path program 1 times [2021-12-21 14:50:24,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:24,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95113938] [2021-12-21 14:50:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:24,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,167 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 14:50:24,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:24,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95113938] [2021-12-21 14:50:24,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95113938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:24,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:24,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:24,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240975159] [2021-12-21 14:50:24,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:24,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:24,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:24,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:24,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:24,169 INFO L87 Difference]: Start difference. First operand 652 states and 1027 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:26,354 INFO L93 Difference]: Finished difference Result 1983 states and 3175 transitions. [2021-12-21 14:50:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:26,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:26,359 INFO L225 Difference]: With dead ends: 1983 [2021-12-21 14:50:26,359 INFO L226 Difference]: Without dead ends: 1350 [2021-12-21 14:50:26,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:26,360 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 1438 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:26,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 1829 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 14:50:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-12-21 14:50:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 953. [2021-12-21 14:50:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 870 states have (on average 1.5701149425287357) internal successors, (1366), 873 states have internal predecessors, (1366), 62 states have call successors, (62), 18 states have call predecessors, (62), 20 states have return successors, (67), 63 states have call predecessors, (67), 62 states have call successors, (67) [2021-12-21 14:50:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1495 transitions. [2021-12-21 14:50:26,403 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1495 transitions. Word has length 156 [2021-12-21 14:50:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:26,404 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1495 transitions. [2021-12-21 14:50:26,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1495 transitions. [2021-12-21 14:50:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:26,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:26,405 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] [2021-12-21 14:50:26,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:50:26,405 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:26,406 INFO L85 PathProgramCache]: Analyzing trace with hash -856247400, now seen corresponding path program 1 times [2021-12-21 14:50:26,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:26,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160898829] [2021-12-21 14:50:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:26,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,503 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 14:50:26,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:26,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160898829] [2021-12-21 14:50:26,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160898829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:26,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:26,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:26,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703700269] [2021-12-21 14:50:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:26,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:26,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:26,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:26,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:26,505 INFO L87 Difference]: Start difference. First operand 953 states and 1495 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:28,806 INFO L93 Difference]: Finished difference Result 3136 states and 5011 transitions. [2021-12-21 14:50:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:28,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:28,814 INFO L225 Difference]: With dead ends: 3136 [2021-12-21 14:50:28,814 INFO L226 Difference]: Without dead ends: 2202 [2021-12-21 14:50:28,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:28,817 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 1350 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:28,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1367 Valid, 2523 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 14:50:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-12-21 14:50:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1559. [2021-12-21 14:50:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1424 states have (on average 1.565308988764045) internal successors, (2229), 1429 states have internal predecessors, (2229), 100 states have call successors, (100), 30 states have call predecessors, (100), 34 states have return successors, (113), 103 states have call predecessors, (113), 100 states have call successors, (113) [2021-12-21 14:50:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2442 transitions. [2021-12-21 14:50:28,906 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2442 transitions. Word has length 156 [2021-12-21 14:50:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:28,906 INFO L470 AbstractCegarLoop]: Abstraction has 1559 states and 2442 transitions. [2021-12-21 14:50:28,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2442 transitions. [2021-12-21 14:50:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:28,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:28,908 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] [2021-12-21 14:50:28,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:50:28,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash -567428010, now seen corresponding path program 1 times [2021-12-21 14:50:28,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:28,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398515652] [2021-12-21 14:50:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:28,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:28,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:28,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,024 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 14:50:29,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:29,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398515652] [2021-12-21 14:50:29,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398515652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:29,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:29,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:29,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555187459] [2021-12-21 14:50:29,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:29,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:29,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:29,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:29,026 INFO L87 Difference]: Start difference. First operand 1559 states and 2442 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:31,216 INFO L93 Difference]: Finished difference Result 5360 states and 8530 transitions. [2021-12-21 14:50:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:31,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:31,236 INFO L225 Difference]: With dead ends: 5360 [2021-12-21 14:50:31,236 INFO L226 Difference]: Without dead ends: 3820 [2021-12-21 14:50:31,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:31,240 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 1346 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:31,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1363 Valid, 2518 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:50:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2021-12-21 14:50:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 2772. [2021-12-21 14:50:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2533 states have (on average 1.5613896565337544) internal successors, (3955), 2542 states have internal predecessors, (3955), 176 states have call successors, (176), 54 states have call predecessors, (176), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2021-12-21 14:50:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4342 transitions. [2021-12-21 14:50:31,403 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4342 transitions. Word has length 156 [2021-12-21 14:50:31,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:31,404 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 4342 transitions. [2021-12-21 14:50:31,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4342 transitions. [2021-12-21 14:50:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:31,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:31,406 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] [2021-12-21 14:50:31,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:50:31,407 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:31,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:31,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1112300584, now seen corresponding path program 1 times [2021-12-21 14:50:31,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:31,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148488689] [2021-12-21 14:50:31,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:31,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,514 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 14:50:31,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:31,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148488689] [2021-12-21 14:50:31,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148488689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:31,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:31,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:31,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262927338] [2021-12-21 14:50:31,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:31,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:31,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:31,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:31,516 INFO L87 Difference]: Start difference. First operand 2772 states and 4342 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:32,936 INFO L93 Difference]: Finished difference Result 6596 states and 10499 transitions. [2021-12-21 14:50:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:32,948 INFO L225 Difference]: With dead ends: 6596 [2021-12-21 14:50:32,948 INFO L226 Difference]: Without dead ends: 3843 [2021-12-21 14:50:32,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:32,953 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 958 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:32,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 1345 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:50:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2021-12-21 14:50:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 2772. [2021-12-21 14:50:33,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2533 states have (on average 1.5578365574417687) internal successors, (3946), 2542 states have internal predecessors, (3946), 176 states have call successors, (176), 54 states have call predecessors, (176), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2021-12-21 14:50:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4333 transitions. [2021-12-21 14:50:33,104 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4333 transitions. Word has length 156 [2021-12-21 14:50:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:33,104 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 4333 transitions. [2021-12-21 14:50:33,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4333 transitions. [2021-12-21 14:50:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:33,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:33,106 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] [2021-12-21 14:50:33,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:50:33,106 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash -437140458, now seen corresponding path program 1 times [2021-12-21 14:50:33,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:33,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258428877] [2021-12-21 14:50:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:33,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:33,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:33,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:33,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:33,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:33,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:33,209 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 14:50:33,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258428877] [2021-12-21 14:50:33,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258428877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:33,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:33,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:33,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002717209] [2021-12-21 14:50:33,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:33,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:33,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:33,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:33,211 INFO L87 Difference]: Start difference. First operand 2772 states and 4333 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:34,531 INFO L93 Difference]: Finished difference Result 6586 states and 10452 transitions. [2021-12-21 14:50:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:34,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:34,542 INFO L225 Difference]: With dead ends: 6586 [2021-12-21 14:50:34,543 INFO L226 Difference]: Without dead ends: 3833 [2021-12-21 14:50:34,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:34,548 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 956 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:34,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1341 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:50:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-12-21 14:50:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2772. [2021-12-21 14:50:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2533 states have (on average 1.5542834583497829) internal successors, (3937), 2542 states have internal predecessors, (3937), 176 states have call successors, (176), 54 states have call predecessors, (176), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2021-12-21 14:50:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4324 transitions. [2021-12-21 14:50:34,746 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4324 transitions. Word has length 156 [2021-12-21 14:50:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:34,747 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 4324 transitions. [2021-12-21 14:50:34,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4324 transitions. [2021-12-21 14:50:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:34,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:34,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:34,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:50:34,749 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:34,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1385192424, now seen corresponding path program 1 times [2021-12-21 14:50:34,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:34,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873836920] [2021-12-21 14:50:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:34,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,845 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 14:50:34,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:34,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873836920] [2021-12-21 14:50:34,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873836920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:34,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:34,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:34,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344797405] [2021-12-21 14:50:34,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:34,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:34,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:34,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:34,847 INFO L87 Difference]: Start difference. First operand 2772 states and 4324 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:36,201 INFO L93 Difference]: Finished difference Result 6576 states and 10405 transitions. [2021-12-21 14:50:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:36,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:36,211 INFO L225 Difference]: With dead ends: 6576 [2021-12-21 14:50:36,211 INFO L226 Difference]: Without dead ends: 3823 [2021-12-21 14:50:36,217 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 14:50:36,218 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 954 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:36,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 1337 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:50:36,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-12-21 14:50:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 2772. [2021-12-21 14:50:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2533 states have (on average 1.550730359257797) internal successors, (3928), 2542 states have internal predecessors, (3928), 176 states have call successors, (176), 54 states have call predecessors, (176), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2021-12-21 14:50:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4315 transitions. [2021-12-21 14:50:36,410 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4315 transitions. Word has length 156 [2021-12-21 14:50:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:36,411 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 4315 transitions. [2021-12-21 14:50:36,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4315 transitions. [2021-12-21 14:50:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:36,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:36,413 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] [2021-12-21 14:50:36,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:50:36,414 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:36,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1969964074, now seen corresponding path program 1 times [2021-12-21 14:50:36,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:36,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622175246] [2021-12-21 14:50:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:36,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:36,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:36,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:36,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:36,508 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 14:50:36,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:36,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622175246] [2021-12-21 14:50:36,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622175246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:36,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:36,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:36,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852270250] [2021-12-21 14:50:36,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:36,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:36,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:36,510 INFO L87 Difference]: Start difference. First operand 2772 states and 4315 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:38,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:38,838 INFO L93 Difference]: Finished difference Result 9777 states and 15392 transitions. [2021-12-21 14:50:38,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:38,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:38,871 INFO L225 Difference]: With dead ends: 9777 [2021-12-21 14:50:38,871 INFO L226 Difference]: Without dead ends: 7024 [2021-12-21 14:50:38,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:38,877 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1324 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 2495 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:38,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 2495 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:50:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7024 states. [2021-12-21 14:50:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7024 to 5232. [2021-12-21 14:50:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5232 states, 4785 states have (on average 1.5456635318704284) internal successors, (7396), 4802 states have internal predecessors, (7396), 328 states have call successors, (328), 102 states have call predecessors, (328), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2021-12-21 14:50:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5232 states to 5232 states and 8149 transitions. [2021-12-21 14:50:39,232 INFO L78 Accepts]: Start accepts. Automaton has 5232 states and 8149 transitions. Word has length 156 [2021-12-21 14:50:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:39,232 INFO L470 AbstractCegarLoop]: Abstraction has 5232 states and 8149 transitions. [2021-12-21 14:50:39,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5232 states and 8149 transitions. [2021-12-21 14:50:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:39,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:39,236 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] [2021-12-21 14:50:39,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:50:39,236 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1890497624, now seen corresponding path program 1 times [2021-12-21 14:50:39,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:39,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365935780] [2021-12-21 14:50:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:39,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,380 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 14:50:39,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365935780] [2021-12-21 14:50:39,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365935780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:39,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:39,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:39,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457216848] [2021-12-21 14:50:39,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:39,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:39,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:39,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:39,382 INFO L87 Difference]: Start difference. First operand 5232 states and 8149 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:40,819 INFO L93 Difference]: Finished difference Result 12300 states and 19420 transitions. [2021-12-21 14:50:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:40,834 INFO L225 Difference]: With dead ends: 12300 [2021-12-21 14:50:40,835 INFO L226 Difference]: Without dead ends: 7087 [2021-12-21 14:50:40,844 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 14:50:40,845 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 1149 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:40,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1167 Valid, 1133 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:50:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7087 states. [2021-12-21 14:50:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7087 to 5232. [2021-12-21 14:50:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5232 states, 4785 states have (on average 1.542110762800418) internal successors, (7379), 4802 states have internal predecessors, (7379), 328 states have call successors, (328), 102 states have call predecessors, (328), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2021-12-21 14:50:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5232 states to 5232 states and 8132 transitions. [2021-12-21 14:50:41,264 INFO L78 Accepts]: Start accepts. Automaton has 5232 states and 8132 transitions. Word has length 156 [2021-12-21 14:50:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:41,264 INFO L470 AbstractCegarLoop]: Abstraction has 5232 states and 8132 transitions. [2021-12-21 14:50:41,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 5232 states and 8132 transitions. [2021-12-21 14:50:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:41,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:41,267 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] [2021-12-21 14:50:41,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:50:41,267 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1460839318, now seen corresponding path program 1 times [2021-12-21 14:50:41,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:41,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543850648] [2021-12-21 14:50:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:41,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,355 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 14:50:41,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:41,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543850648] [2021-12-21 14:50:41,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543850648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:41,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:41,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:41,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897734829] [2021-12-21 14:50:41,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:41,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:41,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:41,357 INFO L87 Difference]: Start difference. First operand 5232 states and 8132 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:45,456 INFO L93 Difference]: Finished difference Result 21023 states and 32918 transitions. [2021-12-21 14:50:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:50:45,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:45,500 INFO L225 Difference]: With dead ends: 21023 [2021-12-21 14:50:45,501 INFO L226 Difference]: Without dead ends: 15810 [2021-12-21 14:50:45,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:50:45,558 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 1418 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 2954 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:45,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1434 Valid, 2636 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2954 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 14:50:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15810 states. [2021-12-21 14:50:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15810 to 10147. [2021-12-21 14:50:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10147 states, 9300 states have (on average 1.540752688172043) internal successors, (14329), 9333 states have internal predecessors, (14329), 616 states have call successors, (616), 198 states have call predecessors, (616), 230 states have return successors, (891), 647 states have call predecessors, (891), 616 states have call successors, (891) [2021-12-21 14:50:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10147 states to 10147 states and 15836 transitions. [2021-12-21 14:50:46,392 INFO L78 Accepts]: Start accepts. Automaton has 10147 states and 15836 transitions. Word has length 156 [2021-12-21 14:50:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:46,393 INFO L470 AbstractCegarLoop]: Abstraction has 10147 states and 15836 transitions. [2021-12-21 14:50:46,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 10147 states and 15836 transitions. [2021-12-21 14:50:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:46,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:46,397 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] [2021-12-21 14:50:46,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 14:50:46,397 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1887090092, now seen corresponding path program 1 times [2021-12-21 14:50:46,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:46,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480786971] [2021-12-21 14:50:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:46,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:46,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:46,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:46,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:46,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:46,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:46,508 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 14:50:46,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:46,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480786971] [2021-12-21 14:50:46,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480786971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:46,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:46,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:46,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581290329] [2021-12-21 14:50:46,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:46,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:46,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:46,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:46,510 INFO L87 Difference]: Start difference. First operand 10147 states and 15836 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:52,398 INFO L93 Difference]: Finished difference Result 40672 states and 63920 transitions. [2021-12-21 14:50:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:50:52,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:50:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:52,476 INFO L225 Difference]: With dead ends: 40672 [2021-12-21 14:50:52,477 INFO L226 Difference]: Without dead ends: 30544 [2021-12-21 14:50:52,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:50:52,502 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 1682 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:52,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1710 Valid, 2459 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 14:50:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30544 states. [2021-12-21 14:50:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30544 to 19796. [2021-12-21 14:50:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19796 states, 18165 states have (on average 1.5402697495183044) internal successors, (27979), 18230 states have internal predecessors, (27979), 1176 states have call successors, (1176), 390 states have call predecessors, (1176), 454 states have return successors, (1969), 1239 states have call predecessors, (1969), 1176 states have call successors, (1969) [2021-12-21 14:50:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19796 states to 19796 states and 31124 transitions. [2021-12-21 14:50:54,410 INFO L78 Accepts]: Start accepts. Automaton has 19796 states and 31124 transitions. Word has length 156 [2021-12-21 14:50:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:54,410 INFO L470 AbstractCegarLoop]: Abstraction has 19796 states and 31124 transitions. [2021-12-21 14:50:54,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 19796 states and 31124 transitions. [2021-12-21 14:50:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:50:54,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:54,418 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] [2021-12-21 14:50:54,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 14:50:54,419 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1025256490, now seen corresponding path program 1 times [2021-12-21 14:50:54,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:54,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448885255] [2021-12-21 14:50:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:54,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:50:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:50:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:50:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,504 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 14:50:54,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:54,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448885255] [2021-12-21 14:50:54,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448885255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:54,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:54,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:54,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868106309] [2021-12-21 14:50:54,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:54,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:54,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:54,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:54,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:54,506 INFO L87 Difference]: Start difference. First operand 19796 states and 31124 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:04,292 INFO L93 Difference]: Finished difference Result 78895 states and 124822 transitions. [2021-12-21 14:51:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:51:04,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-12-21 14:51:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:04,450 INFO L225 Difference]: With dead ends: 78895 [2021-12-21 14:51:04,450 INFO L226 Difference]: Without dead ends: 59118 [2021-12-21 14:51:04,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:51:04,500 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 1643 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1671 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 2546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:04,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1671 Valid, 2458 Invalid, 2546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 14:51:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59118 states. [2021-12-21 14:51:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59118 to 39221. [2021-12-21 14:51:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39221 states, 36054 states have (on average 1.5411604814999722) internal successors, (55565), 36183 states have internal predecessors, (55565), 2264 states have call successors, (2264), 774 states have call predecessors, (2264), 902 states have return successors, (4579), 2391 states have call predecessors, (4579), 2264 states have call successors, (4579) [2021-12-21 14:51:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39221 states to 39221 states and 62408 transitions. [2021-12-21 14:51:08,368 INFO L78 Accepts]: Start accepts. Automaton has 39221 states and 62408 transitions. Word has length 156 [2021-12-21 14:51:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:08,368 INFO L470 AbstractCegarLoop]: Abstraction has 39221 states and 62408 transitions. [2021-12-21 14:51:08,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 39221 states and 62408 transitions. [2021-12-21 14:51:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 14:51:08,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:08,387 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] [2021-12-21 14:51:08,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 14:51:08,387 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:08,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1219301908, now seen corresponding path program 1 times [2021-12-21 14:51:08,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:08,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654040250] [2021-12-21 14:51:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:08,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:08,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:08,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 14:51:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:08,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:51:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:08,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:51:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:08,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 14:51:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:08,489 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 14:51:08,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:08,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654040250] [2021-12-21 14:51:08,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654040250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:08,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:08,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:08,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44256725] [2021-12-21 14:51:08,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:08,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:08,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:08,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:08,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:08,491 INFO L87 Difference]: Start difference. First operand 39221 states and 62408 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)